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  99 #       valuable if I stay in bed after the sun has risen.  As an admirer
 100 #       of moonlight I resent the bossy insistence of those who want to
 101 #       reduce my time for enjoying it.  At the back of the Daylight Saving
 102 #       scheme I detect the bony, blue-fingered hand of Puritanism, eager
 103 #       to push people into bed earlier, and get them up earlier, to make
 104 #       them healthy, wealthy and wise in spite of themselves.
 105 #
 106 #        -- Robertson Davies, The diary of Samuel Marchbanks,
 107 #          Clarke, Irwin (1947), XIX, Sunday
 108 #
 109 # For more about the first ten years of DST in the United States, see
 110 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
 111 # (Carnegie Library of Pittsburgh, 1927).
 112 # http://www.clpgh.org/exhibit/dst.html
 113 #
 114 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
 115 # However, DST was imposed by the Standard Time Act of 1918, which
 116 # was the first nationwide legal time standard, and apparently
 117 # time was just called "Standard Time" or "Daylight Saving Time".
 118 
 119 # From Paul Eggert (2019-06-04):
 120 # Here is the legal basis for the US federal rules.
 121 # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving
 122 #   time for the first time across the US, springing forward on March's last
 123 #   Sunday and falling back on October's last Sunday.
 124 #   https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf
 125 # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday.
 126 #   https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf
 127 # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09.
 128 #   https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf
 129 # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30.
 130 #   https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf
 131 # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST,
 132 #   from April's last Sunday to October's last Sunday, effective 1967.
 133 #   https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf
 134 # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06.
 135 #   https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf
 136 # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to
 137 #   February's last Sunday.
 138 #   https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf
 139 # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first
 140 #   Sunday.
 141 #   https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf
 142 # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward
 143 #   to March's second Sunday and the fall-back to November's first Sunday.
 144 #   https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf
 145 # All transitions are at 02:00 local time.
 146 
 147 # From Arthur David Olson:
 148 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
 149 # Daylight Saving Time in the US was by local option, except during wartime.
 150 
 151 # From Arthur David Olson (2000-09-25):
 152 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
 153 # In the introduction, Oboler spoke of "Eastern Peace Time."
 154 # An AltaVista search turned up:
 155 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
 156 # "When the time is announced over the radio now, it is 'Eastern Peace
 157 # Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
 158 # (August 1945) by way of confirmation.
 159 #
 160 # From Paul Eggert (2017-09-23):
 161 # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
 162 
 163 # From Joseph Gallant citing
 164 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
 165 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set


 181 # importance."
 182 #
 183 # On Aug. 14, stalling while talking steadily into the NBC networks' open
 184 # microphone, St. John heard five bells and waited only to hear a sixth bell,
 185 # before announcing confidently: "Ladies and gentlemen, World War II is over.
 186 # The Japanese have agreed to our surrender terms."
 187 #
 188 # He had scored a 20-second scoop on other broadcasters.
 189 
 190 # From Arthur David Olson (2005-08-22):
 191 # Paul has been careful to use the "US" rules only in those locations
 192 # that are part of the United States; this reflects the real scope of
 193 # U.S. government action.  So even though the "US" rules have changed
 194 # in the latest release, other countries won't be affected.
 195 
 196 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
 197 Rule    US      1918    1919    -       Mar     lastSun 2:00    1:00    D
 198 Rule    US      1918    1919    -       Oct     lastSun 2:00    0       S
 199 Rule    US      1942    only    -       Feb     9       2:00    1:00    W # War
 200 Rule    US      1945    only    -       Aug     14      23:00u  1:00    P # Peace
 201 Rule    US      1945    only    -       Sep     30      2:00    0       S
 202 Rule    US      1967    2006    -       Oct     lastSun 2:00    0       S
 203 Rule    US      1967    1973    -       Apr     lastSun 2:00    1:00    D
 204 Rule    US      1974    only    -       Jan     6       2:00    1:00    D
 205 Rule    US      1975    only    -       Feb     lastSun 2:00    1:00    D
 206 Rule    US      1976    1986    -       Apr     lastSun 2:00    1:00    D
 207 Rule    US      1987    2006    -       Apr     Sun>=1       2:00    1:00    D
 208 Rule    US      2007    max     -       Mar     Sun>=8       2:00    1:00    D
 209 Rule    US      2007    max     -       Nov     Sun>=1       2:00    0       S
 210 
 211 # From Arthur David Olson, 2005-12-19
 212 # We generate the files specified below to guard against old files with
 213 # obsolete information being left in the time zone binary directory.
 214 # We limit the list to names that have appeared in previous versions of
 215 # this time zone package.
 216 # We do these as separate Zones rather than as Links to avoid problems if
 217 # a particular place changes whether it observes DST.
 218 # We put these specifications here in the northamerica file both to
 219 # increase the chances that they'll actually get compiled and to
 220 # avoid the need to duplicate the US rules in another file.
 221 
 222 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 223 Zone    EST              -5:00  -       EST
 224 Zone    MST              -7:00  -       MST
 225 Zone    HST             -10:00  -       HST
 226 Zone    EST5EDT          -5:00  US      E%sT
 227 Zone    CST6CDT          -6:00  US      C%sT
 228 Zone    MST7MDT          -7:00  US      M%sT
 229 Zone    PST8PDT          -8:00  US      P%sT
 230 
 231 # From U. S. Naval Observatory (1989-01-19):
 232 # USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
 233 # USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
 234 # USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
 235 # USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
 236 # USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
 237 # USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
 238 # USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
 239 # USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
 240 # USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
 241 # USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
 242 # USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W


 359 # Four cities are involved.  The two not mentioned above are Smiths Station
 360 # and Valley.  Barbara Brooks, Valley's assistant treasurer, heard it started
 361 # because West Point Pepperell textile mills were in Alabama while the
 362 # corporate office was in Georgia, and residents voted to keep Eastern
 363 # time even after the mills closed.  See: Kazek K. Did you know which
 364 # Alabama towns are in a different time zone?  al.com 2017-02-06.
 365 # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
 366 
 367 # From Paul Eggert (2014-09-06):
 368 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
 369 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
 370 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch.  Round to the
 371 # nearest second.
 372 
 373 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 374 Rule    NYC     1920    only    -       Mar     lastSun 2:00    1:00    D
 375 Rule    NYC     1920    only    -       Oct     lastSun 2:00    0       S
 376 Rule    NYC     1921    1966    -       Apr     lastSun 2:00    1:00    D
 377 Rule    NYC     1921    1954    -       Sep     lastSun 2:00    0       S
 378 Rule    NYC     1955    1966    -       Oct     lastSun 2:00    0       S
 379 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 380 Zone America/New_York   -4:56:02 -      LMT     1883 Nov 18 12:03:58
 381                         -5:00   US      E%sT    1920
 382                         -5:00   NYC     E%sT    1942
 383                         -5:00   US      E%sT    1946
 384                         -5:00   NYC     E%sT    1967
 385                         -5:00   US      E%sT
 386 
 387 # US central time, represented by Chicago
 388 
 389 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
 390 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
 391 # Washington counties), Illinois, western Indiana
 392 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
 393 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
 394 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
 395 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
 396 # western Tennessee, most of Texas, Wisconsin
 397 
 398 # From Paul Eggert (2018-01-07):
 399 # In 1869 the Chicago Astronomical Society contracted with the city to keep


 419 # Statue 175 closer in synch with the US Congress' intent....
 420 # https://docs.legis.wisconsin.gov/2007/related/acts/3
 421 
 422 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
 423 # Fort Pierre is technically located in the Mountain time zone as is
 424 # the rest of Stanley County.  Most of Stanley County and Fort Pierre
 425 # uses the Central time zone due to doing most of their business in
 426 # Pierre so it simplifies schedules.  I have lived in Stanley County
 427 # all my life and it has been that way since I can remember.  (43 years!)
 428 #
 429 # From Paul Eggert (2015-12-25):
 430 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
 431 
 432 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 433 Rule    Chicago 1920    only    -       Jun     13      2:00    1:00    D
 434 Rule    Chicago 1920    1921    -       Oct     lastSun 2:00    0       S
 435 Rule    Chicago 1921    only    -       Mar     lastSun 2:00    1:00    D
 436 Rule    Chicago 1922    1966    -       Apr     lastSun 2:00    1:00    D
 437 Rule    Chicago 1922    1954    -       Sep     lastSun 2:00    0       S
 438 Rule    Chicago 1955    1966    -       Oct     lastSun 2:00    0       S
 439 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 440 Zone America/Chicago    -5:50:36 -      LMT     1883 Nov 18 12:09:24
 441                         -6:00   US      C%sT    1920
 442                         -6:00   Chicago C%sT    1936 Mar  1  2:00
 443                         -5:00   -       EST     1936 Nov 15  2:00
 444                         -6:00   Chicago C%sT    1942
 445                         -6:00   US      C%sT    1946
 446                         -6:00   Chicago C%sT    1967
 447                         -6:00   US      C%sT
 448 # Oliver County, ND switched from mountain to central time on 1992-10-25.
 449 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
 450                         -7:00   US      M%sT    1992 Oct 25  2:00
 451                         -6:00   US      C%sT
 452 # Morton County, ND, switched from mountain to central time on
 453 # 2003-10-26, except for the area around Mandan which was already central time.
 454 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
 455 # Officially this switch also included part of Sioux County, and
 456 # Jones, Mellette, and Todd Counties in South Dakota;
 457 # but in practice these other counties were already observing central time.
 458 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
 459 Zone America/North_Dakota/New_Salem -6:45:39 - LMT      1883 Nov 18 12:14:21


 487 #
 488 # From Paul Eggert (2018-10-25):
 489 # On 1921-03-04 federal law placed all of Texas into the central time zone.
 490 # However, El Paso ignored the law for decades and continued to observe
 491 # mountain time, on the grounds that that's what they had always done
 492 # and they weren't about to let the federal government tell them what to do.
 493 # Eventually the federal government gave in and changed the law on
 494 # 1970-04-10 to match what El Paso was actually doing.  Although
 495 # that's slightly after our 1970 cutoff, there is no need to create a
 496 # separate zone for El Paso since they were ignoring the law anyway.  See:
 497 # Long T. El Pasoans were time rebels, fought to stay in Mountain zone.
 498 # El Paso Times. 2018-10-24 06:40 -06.
 499 # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/
 500 #
 501 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 502 Rule    Denver  1920    1921    -       Mar     lastSun 2:00    1:00    D
 503 Rule    Denver  1920    only    -       Oct     lastSun 2:00    0       S
 504 Rule    Denver  1921    only    -       May     22      2:00    0       S
 505 Rule    Denver  1965    1966    -       Apr     lastSun 2:00    1:00    D
 506 Rule    Denver  1965    1966    -       Oct     lastSun 2:00    0       S
 507 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 508 Zone America/Denver     -6:59:56 -      LMT     1883 Nov 18 12:00:04
 509                         -7:00   US      M%sT    1920
 510                         -7:00   Denver  M%sT    1942
 511                         -7:00   US      M%sT    1946
 512                         -7:00   Denver  M%sT    1967
 513                         -7:00   US      M%sT
 514 
 515 # US Pacific time, represented by Los Angeles
 516 #
 517 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
 518 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
 519 # north of the Salmon River, and the towns of Burgdorf and Warren),
 520 # Nevada (except West Wendover), Oregon (except the northern ¾ of
 521 # Malheur county), and Washington
 522 
 523 # From Paul Eggert (2016-08-20):
 524 # In early February 1948, in response to California's electricity shortage,
 525 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
 526 # causing electric clocks to lose six minutes per day.  (This did not change
 527 # legal time, and is not part of the data here.)  See:


 540 #   to speculate that the objections to Daylight Saving Time were one important
 541 #   factor in the defeat of the Dewey-Warren Presidential ticket in California.
 542 #     -- Ross, p 25
 543 #
 544 # On December 8 the governor exercised the option, setting the date to January 1
 545 # (LA Times 1948-12-09).  The transition time was 02:00 (LA Times 1949-01-01).
 546 #
 547 # Despite the controversy, in 1949 California voters approved Proposition 12,
 548 # which established DST from April's last Sunday at 01:00 until September's
 549 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
 550 # the fall-back date to October's last Sunday. See:
 551 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
 552 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
 553 #
 554 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 555 Rule    CA      1948    only    -       Mar     14      2:01    1:00    D
 556 Rule    CA      1949    only    -       Jan      1      2:00    0       S
 557 Rule    CA      1950    1966    -       Apr     lastSun 1:00    1:00    D
 558 Rule    CA      1950    1961    -       Sep     lastSun 2:00    0       S
 559 Rule    CA      1962    1966    -       Oct     lastSun 2:00    0       S
 560 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 561 Zone America/Los_Angeles -7:52:58 -     LMT     1883 Nov 18 12:07:02
 562                         -8:00   US      P%sT    1946
 563                         -8:00   CA      P%sT    1967
 564                         -8:00   US      P%sT
 565 
 566 # Alaska
 567 # AK%sT is the modern abbreviation for -09 per USNO.
 568 #
 569 # From Paul Eggert (2017-06-15):
 570 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
 571 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
 572 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
 573 # Russian forts and fleet at Sitka fired salutes to mark the ceremony of
 574 # formal transfer.  See the Sacramento Daily Union (1867-11-14), p 3, col 2.
 575 # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
 576 # Sitka workers did not change their calendars until Sunday, 1867-10-20,
 577 # and so celebrated two Sundays that week.  See: Ahllund T (tr Hallamaa P).
 578 # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
 579 # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
 580 # Include only the time zone part of this transition, ignoring the switch


 628 # From Arthur David Olson (2011-02-09):
 629 # I just spoke by phone with a staff member at the Metlakatla Indian
 630 # Community office (using contact information available at
 631 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
 632 # It's shortly after 1:00 here on the east coast of the United States;
 633 # the staffer said it was shortly after 10:00 there. When I asked whether
 634 # that meant they were on Pacific time, they said no - they were on their
 635 # own time. I asked about daylight saving; they said it wasn't used. I
 636 # did not inquire about practices in the past.
 637 
 638 # From Arthur David Olson (2011-08-17):
 639 # For lack of better information, assume that Metlakatla's
 640 # abandonment of use of daylight saving resulted from the 1983 vote.
 641 
 642 # From Steffen Thorsen (2015-11-09):
 643 # It seems Metlakatla did go off PST on Sunday, November 1, changing
 644 # their time to AKST and are going to follow Alaska's DST, switching
 645 # between AKST and AKDT from now on....
 646 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
 647 
 648 # From Ryan Stanley (2018-11-06):
 649 # The Metlakatla community in Alaska has decided not to change its
 650 # clock back an hour starting on November 4th, 2018 (day before yesterday).
 651 # They will be gmtoff=-28800 year-round.
 652 # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/
 653 
 654 # From Paul Eggert (2018-12-16):
 655 # In a 2018-12-11 special election, Metlakatla voted to go back to
 656 # Alaska time (including daylight saving time) starting next year.
 657 # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
 658 #
 659 # From Ryan Stanley (2019-01-11):
 660 # The community will be changing back on the 20th of this month...
 661 # From Tim Parenti (2019-01-11):
 662 # Per an announcement on the Metlakatla community's official Facebook page, the
 663 # "fall back" will be on Sunday 2019-01-20 at 02:00:
 664 # https://www.facebook.com/141055983004923/photos/607150969728753/
 665 # So they won't be waiting for Alaska to join them on 2019-03-10, but will
 666 # rather change their clocks twice in seven weeks.
 667 
 668 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 669 Zone America/Juneau      15:02:19 -     LMT     1867 Oct 19 15:33:32
 670                          -8:57:41 -     LMT     1900 Aug 20 12:00
 671                          -8:00  -       PST     1942
 672                          -8:00  US      P%sT    1946
 673                          -8:00  -       PST     1969
 674                          -8:00  US      P%sT    1980 Apr 27  2:00
 675                          -9:00  US      Y%sT    1980 Oct 26  2:00
 676                          -8:00  US      P%sT    1983 Oct 30  2:00
 677                          -9:00  US      Y%sT    1983 Nov 30
 678                          -9:00  US      AK%sT
 679 Zone America/Sitka       14:58:47 -     LMT     1867 Oct 19 15:30
 680                          -9:01:13 -     LMT     1900 Aug 20 12:00
 681                          -8:00  -       PST     1942
 682                          -8:00  US      P%sT    1946
 683                          -8:00  -       PST     1969
 684                          -8:00  US      P%sT    1983 Oct 30  2:00
 685                          -9:00  US      Y%sT    1983 Nov 30
 686                          -9:00  US      AK%sT
 687 Zone America/Metlakatla  15:13:42 -     LMT     1867 Oct 19 15:44:55
 688                          -8:46:18 -     LMT     1900 Aug 20 12:00
 689                          -8:00  -       PST     1942
 690                          -8:00  US      P%sT    1946
 691                          -8:00  -       PST     1969
 692                          -8:00  US      P%sT    1983 Oct 30  2:00
 693                          -8:00  -       PST     2015 Nov  1  2:00
 694                          -9:00  US      AK%sT   2018 Nov  4  2:00
 695                          -8:00  -       PST     2019 Jan 20  2:00
 696                          -9:00  US      AK%sT
 697 Zone America/Yakutat     14:41:05 -     LMT     1867 Oct 19 15:12:18
 698                          -9:18:55 -     LMT     1900 Aug 20 12:00
 699                          -9:00  -       YST     1942
 700                          -9:00  US      Y%sT    1946
 701                          -9:00  -       YST     1969
 702                          -9:00  US      Y%sT    1983 Nov 30
 703                          -9:00  US      AK%sT
 704 Zone America/Anchorage   14:00:24 -     LMT     1867 Oct 19 14:31:37
 705                          -9:59:36 -     LMT     1900 Aug 20 12:00
 706                         -10:00  -       AST     1942
 707                         -10:00  US      A%sT    1967 Apr
 708                         -10:00  -       AHST    1969
 709                         -10:00  US      AH%sT   1983 Oct 30  2:00
 710                          -9:00  US      Y%sT    1983 Nov 30
 711                          -9:00  US      AK%sT
 712 Zone America/Nome        12:58:22 -     LMT     1867 Oct 19 13:29:35
 713                         -11:01:38 -     LMT     1900 Aug 20 12:00
 714                         -11:00  -       NST     1942
 715                         -11:00  US      N%sT    1946


 768 # and Act 163 (approved 21 May 1933)."
 769 
 770 # From Arthur David Olson (2011-01-19):
 771 # The following is from "Laws of the Territory of Hawaii Passed by the
 772 # Seventeenth Legislature: Regular Session 1933," available (as of
 773 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
 774 # 90...At 2 o'clock ante meridian of the last Sunday in April of each
 775 # year, the standard time of this Territory shall be advanced one
 776 # hour...This Act shall take effect upon its approval. Approved this 26th
 777 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
 778 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
 779 # hereby repealed...This Act shall take effect upon its approval, upon
 780 # which date the standard time of this Territory shall be restored to
 781 # that existing immediately prior to the taking effect of said Act 90.
 782 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
 783 # of the Territory of Hawaii."
 784 #
 785 # Note that 1933-05-21 was a Sunday.
 786 # We're left to guess the time of day when Act 163 was approved; guess noon.
 787 
 788 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 789 Zone Pacific/Honolulu   -10:31:26 -     LMT     1896 Jan 13 12:00
 790                         -10:30  -       HST     1933 Apr 30  2:00
 791                         -10:30  1:00    HDT     1933 May 21 12:00
 792                         -10:30  US      H%sT    1947 Jun  8  2:00
 793                         -10:00  -       HST
 794 
 795 # Now we turn to US areas that have diverged from the consensus since 1970.
 796 
 797 # Arizona mostly uses MST.
 798 
 799 # From Paul Eggert (2002-10-20):
 800 #
 801 # The information in the rest of this paragraph is derived from the
 802 # Daylight Saving Time web page
 803 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
 804 # maintained by the Arizona State Library, Archives and Public Records.
 805 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
 806 # time, but by federal law railroads, airlines, bus lines, military
 807 # personnel, and some engaged in interstate commerce continued to
 808 # observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
 809 # Gazette says that was the date the law changed, and that 04-01 was
 810 # the date the state's clocks would change.  In 1945 the State of
 811 # Arizona used standard time all year, again with exceptions only as
 812 # mandated by federal law.  Arizona observed DST in 1967, but Arizona
 813 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
 814 #
 815 # Shanks says the 1944 experiment came to an end on 1944-03-17.
 816 # Go with the Arizona State Library instead.
 817 
 818 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 819 Zone America/Phoenix    -7:28:18 -      LMT     1883 Nov 18 11:31:42
 820                         -7:00   US      M%sT    1944 Jan  1  0:01
 821                         -7:00   -       MST     1944 Apr  1  0:01
 822                         -7:00   US      M%sT    1944 Oct  1  0:01
 823                         -7:00   -       MST     1967
 824                         -7:00   US      M%sT    1968 Mar 21
 825                         -7:00   -       MST
 826 # From Arthur David Olson (1988-02-13):
 827 # A writer from the Inter Tribal Council of Arizona, Inc.,
 828 # notes in private correspondence dated 1987-12-28 that "Presently, only the
 829 # Navajo Nation participates in the Daylight Saving Time policy, due to its
 830 # large size and location in three states."  (The "only" means that other
 831 # tribal nations don't use DST.)
 832 #
 833 # From Paul Eggert (2013-08-26):
 834 # See America/Denver for a zone appropriate for the Navajo Nation.
 835 
 836 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
 837 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
 838 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
 839 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
 840 # Teton, Twin Falls, Valley, Washington counties, and the southern
 841 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
 842 # switched four weeks late in 1974.
 843 #
 844 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 845 Zone America/Boise      -7:44:49 -      LMT     1883 Nov 18 12:15:11
 846                         -8:00   US      P%sT    1923 May 13  2:00
 847                         -7:00   US      M%sT    1974
 848                         -7:00   -       MST     1974 Feb  3  2:00
 849                         -7:00   US      M%sT
 850 
 851 # Indiana
 852 #
 853 # For a map of Indiana's time zone regions, see:
 854 # https://en.wikipedia.org/wiki/Time_in_Indiana
 855 #
 856 # From Paul Eggert (2018-11-30):
 857 # A brief but entertaining history of time in Indiana describes a 1949 debate
 858 # in the Indiana House where city legislators (who favored "fast time")
 859 # tussled with farm legislators (who didn't) over a bill to outlaw DST:
 860 #  "Lacking enough votes, the city faction tries to filibuster until time runs
 861 #   out on the session at midnight, but rural champion Rep. Herbert Copeland,
 862 #   R-Madison, leans over the gallery railing and forces the official clock
 863 #   back to 9 p.m., breaking it in the process.  The clock sticks on 9 as the
 864 #   debate rages on into the night.  The filibuster finally dies out and the
 865 #   bill passes, while outside the chamber, clocks read 3:30 a.m.  In the end,
 866 #   it doesn't matter which side won.  The law has no enforcement powers and
 867 #   is simply ignored by fast-time communities."
 868 # How Indiana went from 'God's time' to split zones and daylight-saving.
 869 # Indianapolis Star. 2018-11-27 14:58 -05.
 870 # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/
 871 #
 872 # From Paul Eggert (2007-08-17):
 873 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
 874 # with the following exceptions:
 875 #
 876 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
 877 #   Vanderburgh, and Warrick counties have been like America/Chicago.
 878 #
 879 # - Dearborn and Ohio counties have been like America/New_York.
 880 #
 881 # - Clark, Floyd, and Harrison counties have been like
 882 #   America/Kentucky/Louisville.
 883 #
 884 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
 885 #   and Switzerland counties have their own time zone histories as noted below.
 886 #
 887 # Shanks partitioned Indiana into 345 regions, each with its own time history,
 888 # and wrote "Even newspaper reports present contradictory information."
 889 # Those Hoosiers!  Such a flighty and changeable people!
 890 # Fortunately, most of the complexity occurred before our cutoff date of 1970.
 891 #


 896 # From Paul Eggert (2014-06-26):
 897 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
 898 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
 899 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
 900 # Eastern Time Zone to the Central Time Zone.... The effective date of
 901 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
 902 # changeover date from standard time to Daylight Saving Time."
 903 # Strictly speaking, this meant the affected counties changed their
 904 # clocks twice that night, but this obviously was in error.  The intent
 905 # was that 01:59:59 EST be followed by 02:00:00 CDT.
 906 
 907 # From Gwillim Law (2007-02-10):
 908 # The Associated Press has been reporting that Pulaski County, Indiana is
 909 # going to switch from Central to Eastern Time on March 11, 2007....
 910 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
 911 
 912 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 913 Rule Indianapolis 1941  only    -       Jun     22      2:00    1:00    D
 914 Rule Indianapolis 1941  1954    -       Sep     lastSun 2:00    0       S
 915 Rule Indianapolis 1946  1954    -       Apr     lastSun 2:00    1:00    D
 916 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 917 Zone America/Indiana/Indianapolis -5:44:38 - LMT        1883 Nov 18 12:15:22
 918                         -6:00   US      C%sT    1920
 919                         -6:00 Indianapolis C%sT 1942
 920                         -6:00   US      C%sT    1946
 921                         -6:00 Indianapolis C%sT 1955 Apr 24  2:00
 922                         -5:00   -       EST     1957 Sep 29  2:00
 923                         -6:00   -       CST     1958 Apr 27  2:00
 924                         -5:00   -       EST     1969
 925                         -5:00   US      E%sT    1971
 926                         -5:00   -       EST     2006
 927                         -5:00   US      E%sT
 928 #
 929 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
 930 # as well as from 1976 through 2005.
 931 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 932 Rule    Marengo 1951    only    -       Apr     lastSun 2:00    1:00    D
 933 Rule    Marengo 1951    only    -       Sep     lastSun 2:00    0       S
 934 Rule    Marengo 1954    1960    -       Apr     lastSun 2:00    1:00    D
 935 Rule    Marengo 1954    1960    -       Sep     lastSun 2:00    0       S
 936 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 937 Zone America/Indiana/Marengo -5:45:23 - LMT     1883 Nov 18 12:14:37
 938                         -6:00   US      C%sT    1951
 939                         -6:00   Marengo C%sT    1961 Apr 30  2:00
 940                         -5:00   -       EST     1969
 941                         -5:00   US      E%sT    1974 Jan  6  2:00
 942                         -6:00   1:00    CDT     1974 Oct 27  2:00
 943                         -5:00   US      E%sT    1976
 944                         -5:00   -       EST     2006
 945                         -5:00   US      E%sT
 946 #
 947 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
 948 # switched from eastern to central time in April 2006, then switched back
 949 # in November 2007.
 950 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 951 Rule Vincennes  1946    only    -       Apr     lastSun 2:00    1:00    D
 952 Rule Vincennes  1946    only    -       Sep     lastSun 2:00    0       S
 953 Rule Vincennes  1953    1954    -       Apr     lastSun 2:00    1:00    D
 954 Rule Vincennes  1953    1959    -       Sep     lastSun 2:00    0       S
 955 Rule Vincennes  1955    only    -       May      1      0:00    1:00    D
 956 Rule Vincennes  1956    1963    -       Apr     lastSun 2:00    1:00    D
 957 Rule Vincennes  1960    only    -       Oct     lastSun 2:00    0       S
 958 Rule Vincennes  1961    only    -       Sep     lastSun 2:00    0       S
 959 Rule Vincennes  1962    1963    -       Oct     lastSun 2:00    0       S
 960 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 961 Zone America/Indiana/Vincennes -5:50:07 - LMT   1883 Nov 18 12:09:53
 962                         -6:00   US      C%sT    1946
 963                         -6:00 Vincennes C%sT    1964 Apr 26  2:00
 964                         -5:00   -       EST     1969
 965                         -5:00   US      E%sT    1971
 966                         -5:00   -       EST     2006 Apr  2  2:00
 967                         -6:00   US      C%sT    2007 Nov  4  2:00
 968                         -5:00   US      E%sT
 969 #
 970 # Perry County, Indiana, switched from eastern to central time in April 2006.
 971 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 972 Rule Perry      1946    only    -       Apr     lastSun 2:00    1:00    D
 973 Rule Perry      1946    only    -       Sep     lastSun 2:00    0       S
 974 Rule Perry      1953    1954    -       Apr     lastSun 2:00    1:00    D
 975 Rule Perry      1953    1959    -       Sep     lastSun 2:00    0       S
 976 Rule Perry      1955    only    -       May      1      0:00    1:00    D
 977 Rule Perry      1956    1963    -       Apr     lastSun 2:00    1:00    D
 978 Rule Perry      1960    only    -       Oct     lastSun 2:00    0       S
 979 Rule Perry      1961    only    -       Sep     lastSun 2:00    0       S
 980 Rule Perry      1962    1963    -       Oct     lastSun 2:00    0       S
 981 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 982 Zone America/Indiana/Tell_City -5:47:03 - LMT   1883 Nov 18 12:12:57
 983                         -6:00   US      C%sT    1946
 984                         -6:00 Perry     C%sT    1964 Apr 26  2:00
 985                         -5:00   -       EST     1969
 986                         -5:00   US      E%sT    1971
 987                         -5:00   -       EST     2006 Apr  2  2:00
 988                         -6:00   US      C%sT
 989 #
 990 # Pike County, Indiana moved from central to eastern time in 1977,
 991 # then switched back in 2006, then switched back again in 2007.
 992 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 993 Rule    Pike    1955    only    -       May      1      0:00    1:00    D
 994 Rule    Pike    1955    1960    -       Sep     lastSun 2:00    0       S
 995 Rule    Pike    1956    1964    -       Apr     lastSun 2:00    1:00    D
 996 Rule    Pike    1961    1964    -       Oct     lastSun 2:00    0       S
 997 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
 998 Zone America/Indiana/Petersburg -5:49:07 - LMT  1883 Nov 18 12:10:53
 999                         -6:00   US      C%sT    1955
1000                         -6:00   Pike    C%sT    1965 Apr 25  2:00
1001                         -5:00   -       EST     1966 Oct 30  2:00
1002                         -6:00   US      C%sT    1977 Oct 30  2:00
1003                         -5:00   -       EST     2006 Apr  2  2:00
1004                         -6:00   US      C%sT    2007 Nov  4  2:00
1005                         -5:00   US      E%sT
1006 #
1007 # Starke County, Indiana moved from central to eastern time in 1991,
1008 # then switched back in 2006.
1009 # From Arthur David Olson (1991-10-28):
1010 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
1011 # notes that Starke County switched from Central time to Eastern time as of
1012 # 1991-10-27.
1013 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1014 Rule    Starke  1947    1961    -       Apr     lastSun 2:00    1:00    D
1015 Rule    Starke  1947    1954    -       Sep     lastSun 2:00    0       S
1016 Rule    Starke  1955    1956    -       Oct     lastSun 2:00    0       S
1017 Rule    Starke  1957    1958    -       Sep     lastSun 2:00    0       S
1018 Rule    Starke  1959    1961    -       Oct     lastSun 2:00    0       S
1019 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1020 Zone America/Indiana/Knox -5:46:30 -    LMT     1883 Nov 18 12:13:30
1021                         -6:00   US      C%sT    1947
1022                         -6:00   Starke  C%sT    1962 Apr 29  2:00
1023                         -5:00   -       EST     1963 Oct 27  2:00
1024                         -6:00   US      C%sT    1991 Oct 27  2:00
1025                         -5:00   -       EST     2006 Apr  2  2:00
1026                         -6:00   US      C%sT
1027 #
1028 # Pulaski County, Indiana, switched from eastern to central time in
1029 # April 2006 and then switched back in March 2007.
1030 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1031 Rule    Pulaski 1946    1960    -       Apr     lastSun 2:00    1:00    D
1032 Rule    Pulaski 1946    1954    -       Sep     lastSun 2:00    0       S
1033 Rule    Pulaski 1955    1956    -       Oct     lastSun 2:00    0       S
1034 Rule    Pulaski 1957    1960    -       Sep     lastSun 2:00    0       S
1035 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1036 Zone America/Indiana/Winamac -5:46:25 - LMT     1883 Nov 18 12:13:35
1037                         -6:00   US      C%sT    1946
1038                         -6:00   Pulaski C%sT    1961 Apr 30  2:00
1039                         -5:00   -       EST     1969
1040                         -5:00   US      E%sT    1971
1041                         -5:00   -       EST     2006 Apr  2  2:00
1042                         -6:00   US      C%sT    2007 Mar 11  2:00
1043                         -5:00   US      E%sT
1044 #
1045 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
1046 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1047 Zone America/Indiana/Vevay -5:40:16 -   LMT     1883 Nov 18 12:19:44
1048                         -6:00   US      C%sT    1954 Apr 25  2:00
1049                         -5:00   -       EST     1969
1050                         -5:00   US      E%sT    1973
1051                         -5:00   -       EST     2006
1052                         -5:00   US      E%sT
1053 
1054 # From Paul Eggert (2018-03-20):
1055 # The Louisville & Nashville Railroad's 1883-11-18 change occurred at
1056 # 10:00 old local time; train were supposed to come to a standstill
1057 # for precisely 18 minutes.  See Bartky Fig. 1 (page 50).  It is not
1058 # clear how this matched civil time in Louisville, so for now continue
1059 # to assume Louisville switched at noon new local time, like New York.
1060 #
1061 # Part of Kentucky left its clocks alone in 1974.
1062 # This also includes Clark, Floyd, and Harrison counties in Indiana.
1063 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1064 Rule Louisville 1921    only    -       May     1       2:00    1:00    D
1065 Rule Louisville 1921    only    -       Sep     1       2:00    0       S
1066 Rule Louisville 1941    1961    -       Apr     lastSun 2:00    1:00    D
1067 Rule Louisville 1941    only    -       Sep     lastSun 2:00    0       S
1068 Rule Louisville 1946    only    -       Jun     2       2:00    0       S
1069 Rule Louisville 1950    1955    -       Sep     lastSun 2:00    0       S
1070 Rule Louisville 1956    1960    -       Oct     lastSun 2:00    0       S
1071 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1072 Zone America/Kentucky/Louisville -5:43:02 -     LMT     1883 Nov 18 12:16:58
1073                         -6:00   US      C%sT    1921
1074                         -6:00 Louisville C%sT   1942
1075                         -6:00   US      C%sT    1946
1076                         -6:00 Louisville C%sT   1961 Jul 23  2:00
1077                         -5:00   -       EST     1968
1078                         -5:00   US      E%sT    1974 Jan  6  2:00
1079                         -6:00   1:00    CDT     1974 Oct 27  2:00
1080                         -5:00   US      E%sT
1081 #
1082 # Wayne County, Kentucky
1083 #
1084 # From Lake Cumberland LIFE
1085 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
1086 # (1999-01-29) via WKYM-101.7:
1087 # Clinton County has joined Wayne County in asking the DoT to change from
1088 # the Central to the Eastern time zone....  The Wayne County government made
1089 # the same request in December.  And while Russell County officials have not
1090 # taken action, the majority of respondents to a poll conducted there in
1091 # August indicated they would like to change to "fast time" also.


1157 # one hour in 1914."  This change is not in Shanks.  We have no more
1158 # info, so omit this for now.
1159 #
1160 # From Paul Eggert (2017-07-26):
1161 # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
1162 # until 10-29 00:01, I now see multiple reports that this is incorrect.
1163 # For example, according to a 50-year anniversary report about the 1967
1164 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
1165 # the last fly ball of the doubleheader settled into the glove of leftfielder
1166 # Lenny Green, it was after 7 p.m.  Detroit did not observe daylight saving
1167 # time, so light was already starting to fail.  Twilight was made even deeper
1168 # by billowing columns of smoke that ascended in an unbroken wall north of the
1169 # ballpark."  See: Dow B. Detroit '67: As violence unfolded, Tigers played two
1170 # at home vs. Yankees. Detroit Free Press 2017-07-23.
1171 # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
1172 #
1173 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1174 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1175 Rule    Detroit 1948    only    -       Apr     lastSun 2:00    1:00    D
1176 Rule    Detroit 1948    only    -       Sep     lastSun 2:00    0       S
1177 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1178 Zone America/Detroit    -5:32:11 -      LMT     1905
1179                         -6:00   -       CST     1915 May 15  2:00
1180                         -5:00   -       EST     1942
1181                         -5:00   US      E%sT    1946
1182                         -5:00   Detroit E%sT    1973
1183                         -5:00   US      E%sT    1975
1184                         -5:00   -       EST     1975 Apr 27  2:00
1185                         -5:00   US      E%sT
1186 #
1187 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1188 # switched from EST to CST/CDT in 1973.
1189 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1190 Rule Menominee  1946    only    -       Apr     lastSun 2:00    1:00    D
1191 Rule Menominee  1946    only    -       Sep     lastSun 2:00    0       S
1192 Rule Menominee  1966    only    -       Apr     lastSun 2:00    1:00    D
1193 Rule Menominee  1966    only    -       Oct     lastSun 2:00    0       S
1194 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1195 Zone America/Menominee  -5:50:27 -      LMT     1885 Sep 18 12:00
1196                         -6:00   US      C%sT    1946
1197                         -6:00 Menominee C%sT    1969 Apr 27  2:00
1198                         -5:00   -       EST     1973 Apr 29  2:00
1199                         -6:00   US      C%sT
1200 
1201 # Navassa
1202 # administered by the US Fish and Wildlife Service
1203 # claimed by US under the provisions of the 1856 Guano Islands Act
1204 # also claimed by Haiti
1205 # occupied 1857/1900 by the Navassa Phosphate Co
1206 # US lighthouse 1917/1996-09
1207 # currently uninhabited
1208 # see Mark Fineman, "An Isle Rich in Guano and Discord",
1209 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1210 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
1211 
1212 ################################################################################
1213 
1214 


1408 # changes to the Newfoundland Standard Time Act have been proclaimed.
1409 # The change in the Act stipulates that the change from Daylight Savings
1410 # Time to Standard Time and from Standard Time to Daylight Savings Time
1411 # now occurs at 2:00AM.
1412 # ...
1413 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1414 # ...
1415 # MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
1416 # Office of the Chief Information Officer
1417 # Executive Council
1418 # Government of Newfoundland & Labrador
1419 
1420 Rule    StJohns 1987    only    -       Apr     Sun>=1       0:01    1:00    D
1421 Rule    StJohns 1987    2006    -       Oct     lastSun 0:01    0       S
1422 Rule    StJohns 1988    only    -       Apr     Sun>=1       0:01    2:00    DD
1423 Rule    StJohns 1989    2006    -       Apr     Sun>=1       0:01    1:00    D
1424 Rule    StJohns 2007    2011    -       Mar     Sun>=8       0:01    1:00    D
1425 Rule    StJohns 2007    2010    -       Nov     Sun>=1       0:01    0       S
1426 #
1427 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1428 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1429 Zone America/St_Johns   -3:30:52 -      LMT     1884
1430                         -3:30:52 StJohns N%sT   1918
1431                         -3:30:52 Canada N%sT    1919
1432                         -3:30:52 StJohns N%sT   1935 Mar 30
1433                         -3:30   StJohns N%sT    1942 May 11
1434                         -3:30   Canada  N%sT    1946
1435                         -3:30   StJohns N%sT    2011 Nov
1436                         -3:30   Canada  N%sT
1437 
1438 # most of east Labrador
1439 
1440 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1441 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1442 Zone America/Goose_Bay  -4:01:40 -      LMT     1884 # Happy Valley-Goose Bay
1443                         -3:30:52 -      NST     1918
1444                         -3:30:52 Canada N%sT    1919
1445                         -3:30:52 -      NST     1935 Mar 30
1446                         -3:30   -       NST     1936
1447                         -3:30   StJohns N%sT    1942 May 11
1448                         -3:30   Canada  N%sT    1946
1449                         -3:30   StJohns N%sT    1966 Mar 15  2:00
1450                         -4:00   StJohns A%sT    2011 Nov
1451                         -4:00   Canada  A%sT
1452 
1453 
1454 # west Labrador, Nova Scotia, Prince Edward I
1455 
1456 # From Brian Inglis (2015-07-20):
1457 # From the historical weather station records available at:
1458 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1459 # Sydney shares the same time history as Glace Bay, so was
1460 # likely to be the same across the island....
1461 # Sydney, as the capital and most populous location, or Cape Breton, would


1495 Rule    Halifax 1933    only    -       Apr     30      0:00    1:00    D
1496 Rule    Halifax 1933    only    -       Oct      2      0:00    0       S
1497 Rule    Halifax 1934    only    -       May     20      0:00    1:00    D
1498 Rule    Halifax 1934    only    -       Sep     16      0:00    0       S
1499 Rule    Halifax 1935    only    -       Jun      2      0:00    1:00    D
1500 Rule    Halifax 1935    only    -       Sep     30      0:00    0       S
1501 Rule    Halifax 1936    only    -       Jun      1      0:00    1:00    D
1502 Rule    Halifax 1936    only    -       Sep     14      0:00    0       S
1503 Rule    Halifax 1937    1938    -       May     Sun>=1       0:00    1:00    D
1504 Rule    Halifax 1937    1941    -       Sep     Mon>=24      0:00    0       S
1505 Rule    Halifax 1939    only    -       May     28      0:00    1:00    D
1506 Rule    Halifax 1940    1941    -       May     Sun>=1       0:00    1:00    D
1507 Rule    Halifax 1946    1949    -       Apr     lastSun 2:00    1:00    D
1508 Rule    Halifax 1946    1949    -       Sep     lastSun 2:00    0       S
1509 Rule    Halifax 1951    1954    -       Apr     lastSun 2:00    1:00    D
1510 Rule    Halifax 1951    1954    -       Sep     lastSun 2:00    0       S
1511 Rule    Halifax 1956    1959    -       Apr     lastSun 2:00    1:00    D
1512 Rule    Halifax 1956    1959    -       Sep     lastSun 2:00    0       S
1513 Rule    Halifax 1962    1973    -       Apr     lastSun 2:00    1:00    D
1514 Rule    Halifax 1962    1973    -       Oct     lastSun 2:00    0       S
1515 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1516 Zone America/Halifax    -4:14:24 -      LMT     1902 Jun 15
1517                         -4:00   Halifax A%sT    1918
1518                         -4:00   Canada  A%sT    1919
1519                         -4:00   Halifax A%sT    1942 Feb  9  2:00s
1520                         -4:00   Canada  A%sT    1946
1521                         -4:00   Halifax A%sT    1974
1522                         -4:00   Canada  A%sT
1523 Zone America/Glace_Bay  -3:59:48 -      LMT     1902 Jun 15
1524                         -4:00   Canada  A%sT    1953
1525                         -4:00   Halifax A%sT    1954
1526                         -4:00   -       AST     1972
1527                         -4:00   Halifax A%sT    1974
1528                         -4:00   Canada  A%sT
1529 
1530 # New Brunswick
1531 
1532 # From Paul Eggert (2007-01-31):
1533 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1534 # says they changed at 00:01 through 2006, and
1535 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1536 # clear that this was the case since at least 1993.
1537 # For now, assume it started in 1993.
1538 
1539 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1540 Rule    Moncton 1933    1935    -       Jun     Sun>=8       1:00    1:00    D
1541 Rule    Moncton 1933    1935    -       Sep     Sun>=8       1:00    0       S
1542 Rule    Moncton 1936    1938    -       Jun     Sun>=1       1:00    1:00    D
1543 Rule    Moncton 1936    1938    -       Sep     Sun>=1       1:00    0       S
1544 Rule    Moncton 1939    only    -       May     27      1:00    1:00    D
1545 Rule    Moncton 1939    1941    -       Sep     Sat>=21      1:00    0       S
1546 Rule    Moncton 1940    only    -       May     19      1:00    1:00    D
1547 Rule    Moncton 1941    only    -       May      4      1:00    1:00    D
1548 Rule    Moncton 1946    1972    -       Apr     lastSun 2:00    1:00    D
1549 Rule    Moncton 1946    1956    -       Sep     lastSun 2:00    0       S
1550 Rule    Moncton 1957    1972    -       Oct     lastSun 2:00    0       S
1551 Rule    Moncton 1993    2006    -       Apr     Sun>=1       0:01    1:00    D
1552 Rule    Moncton 1993    2006    -       Oct     lastSun 0:01    0       S
1553 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1554 Zone America/Moncton    -4:19:08 -      LMT     1883 Dec  9
1555                         -5:00   -       EST     1902 Jun 15
1556                         -4:00   Canada  A%sT    1933
1557                         -4:00   Moncton A%sT    1942
1558                         -4:00   Canada  A%sT    1946
1559                         -4:00   Moncton A%sT    1973
1560                         -4:00   Canada  A%sT    1993
1561                         -4:00   Moncton A%sT    2007
1562                         -4:00   Canada  A%sT
1563 
1564 # Quebec
1565 
1566 # From Paul Eggert (2015-03-24):
1567 # See America/Toronto for most of Quebec, including Montreal.
1568 #
1569 # Matthews and Vincent (1998) also write that Quebec east of the -63
1570 # meridian is supposed to observe AST, but residents as far east as
1571 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1572 # The Quebec department of justice writes in
1573 # "The situation in Minganie and Basse-Côte-Nord"
1574 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1575 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1576 # observes Atlantic standard time all year round.
1577 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1578 # says this common practice was codified into law as of 2007.
1579 # For lack of better info, guess this practice began around 1970, contra to
1580 # Shanks & Pottenger who have this region observing AST/ADT.
1581 
1582 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1583 Zone America/Blanc-Sablon -3:48:28 -    LMT     1884
1584                         -4:00   Canada  A%sT    1970
1585                         -4:00   -       AST
1586 
1587 # Ontario
1588 
1589 # From Paul Eggert (2006-07-09):
1590 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1591 # Toronto.
1592 # Thunder Bay skipped DST in 1973.
1593 # Many smaller locales did not observe peacetime DST until 1974;
1594 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1595 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1596 
1597 # From Mark Brader (2003-07-26):
1598 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1599 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1600 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1601 # have already done so.  In Orillia DST was to run until Saturday,
1602 # 1912-08-31 (no time mentioned), but it was met with considerable


1730 # Manitoba              Not used.
1731 # Saskatchewan          In Regina only.
1732 # Alberta               Not used.
1733 # British Columbia      Not used.
1734 #
1735 #   With some exceptions, the use of daylight saving may be said to be limited
1736 # to those cities and towns lying between Quebec city and Windsor, Ont.
1737 
1738 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1739 Rule    Toronto 1919    only    -       Mar     30      23:30   1:00    D
1740 Rule    Toronto 1919    only    -       Oct     26      0:00    0       S
1741 Rule    Toronto 1920    only    -       May      2      2:00    1:00    D
1742 Rule    Toronto 1920    only    -       Sep     26      0:00    0       S
1743 Rule    Toronto 1921    only    -       May     15      2:00    1:00    D
1744 Rule    Toronto 1921    only    -       Sep     15      2:00    0       S
1745 Rule    Toronto 1922    1923    -       May     Sun>=8       2:00    1:00    D
1746 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1747 # was meant.
1748 Rule    Toronto 1922    1926    -       Sep     Sun>=15      2:00    0       S
1749 Rule    Toronto 1924    1927    -       May     Sun>=1       2:00    1:00    D
1750 Rule    Toronto 1927    1937    -       Sep     Sun>=25      2:00    0       S
1751 Rule    Toronto 1928    1937    -       Apr     Sun>=25      2:00    1:00    D
1752 Rule    Toronto 1938    1940    -       Apr     lastSun 2:00    1:00    D
1753 Rule    Toronto 1938    1939    -       Sep     lastSun 2:00    0       S









1754 Rule    Toronto 1945    1946    -       Sep     lastSun 2:00    0       S
1755 Rule    Toronto 1946    only    -       Apr     lastSun 2:00    1:00    D
1756 Rule    Toronto 1947    1949    -       Apr     lastSun 0:00    1:00    D
1757 Rule    Toronto 1947    1948    -       Sep     lastSun 0:00    0       S
1758 Rule    Toronto 1949    only    -       Nov     lastSun 0:00    0       S
1759 Rule    Toronto 1950    1973    -       Apr     lastSun 2:00    1:00    D
1760 Rule    Toronto 1950    only    -       Nov     lastSun 2:00    0       S
1761 Rule    Toronto 1951    1956    -       Sep     lastSun 2:00    0       S
1762 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1763 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1764 # is wrong, and that he had confirmed it by checking the 1971-10-30
1765 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1766 Rule    Toronto 1957    1973    -       Oct     lastSun 2:00    0       S
1767 
1768 # From Paul Eggert (2003-07-27):
1769 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1770 # Port Arthur, Ontario, the principle of the Bill has been in
1771 # operation for the past three years, and in the City of Moose Jaw,
1772 # Saskatchewan, for one year."
1773 
1774 # From David Bryan via Tory Tronrud, Director/Curator,
1775 # Thunder Bay Museum (2003-11-12):
1776 # There is some suggestion, however, that, by-law or not, daylight
1777 # savings time was being practiced in Fort William and Port Arthur
1778 # before 1909.... [I]n 1910, the line between the Eastern and Central
1779 # Time Zones was permanently moved about two hundred miles west to
1780 # include the Thunder Bay area....  When Canada adopted daylight
1781 # savings time in 1916, Fort William and Port Arthur, having done so
1782 # already, did not change their clocks....  During the Second World
1783 # War,... [t]he cities agreed to implement DST during the summer
1784 # months for the remainder of the war years.
1785 
1786 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1787 Zone America/Toronto    -5:17:32 -      LMT     1895
1788                         -5:00   Canada  E%sT    1919
1789                         -5:00   Toronto E%sT    1942 Feb  9  2:00s
1790                         -5:00   Canada  E%sT    1946
1791                         -5:00   Toronto E%sT    1974
1792                         -5:00   Canada  E%sT
1793 Zone America/Thunder_Bay -5:57:00 -     LMT     1895
1794                         -6:00   -       CST     1910
1795                         -5:00   -       EST     1942
1796                         -5:00   Canada  E%sT    1970
1797                         -5:00   Toronto E%sT    1973
1798                         -5:00   -       EST     1974
1799                         -5:00   Canada  E%sT
1800 Zone America/Nipigon    -5:53:04 -      LMT     1895
1801                         -5:00   Canada  E%sT    1940 Sep 29
1802                         -5:00   1:00    EDT     1942 Feb  9  2:00s
1803                         -5:00   Canada  E%sT
1804 Zone America/Rainy_River -6:18:16 -     LMT     1895
1805                         -6:00   Canada  C%sT    1940 Sep 29
1806                         -6:00   1:00    CDT     1942 Feb  9  2:00s


1841 Rule    Winn    1937    only    -       May     16      2:00    1:00    D
1842 Rule    Winn    1937    only    -       Sep     26      2:00    0       S
1843 Rule    Winn    1942    only    -       Feb      9      2:00    1:00    W # War
1844 Rule    Winn    1945    only    -       Aug     14      23:00u  1:00    P # Peace
1845 Rule    Winn    1945    only    -       Sep     lastSun 2:00    0       S
1846 Rule    Winn    1946    only    -       May     12      2:00    1:00    D
1847 Rule    Winn    1946    only    -       Oct     13      2:00    0       S
1848 Rule    Winn    1947    1949    -       Apr     lastSun 2:00    1:00    D
1849 Rule    Winn    1947    1949    -       Sep     lastSun 2:00    0       S
1850 Rule    Winn    1950    only    -       May      1      2:00    1:00    D
1851 Rule    Winn    1950    only    -       Sep     30      2:00    0       S
1852 Rule    Winn    1951    1960    -       Apr     lastSun 2:00    1:00    D
1853 Rule    Winn    1951    1958    -       Sep     lastSun 2:00    0       S
1854 Rule    Winn    1959    only    -       Oct     lastSun 2:00    0       S
1855 Rule    Winn    1960    only    -       Sep     lastSun 2:00    0       S
1856 Rule    Winn    1963    only    -       Apr     lastSun 2:00    1:00    D
1857 Rule    Winn    1963    only    -       Sep     22      2:00    0       S
1858 Rule    Winn    1966    1986    -       Apr     lastSun 2:00s   1:00    D
1859 Rule    Winn    1966    2005    -       Oct     lastSun 2:00s   0       S
1860 Rule    Winn    1987    2005    -       Apr     Sun>=1       2:00s   1:00    D
1861 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1862 Zone America/Winnipeg   -6:28:36 -      LMT     1887 Jul 16
1863                         -6:00   Winn    C%sT    2006
1864                         -6:00   Canada  C%sT
1865 
1866 
1867 # Saskatchewan
1868 
1869 # From Mark Brader (2003-07-26):
1870 # The first actual adoption of DST in Canada was at the municipal
1871 # level.  As the [Toronto] Star put it (1912-06-07), "While people
1872 # elsewhere have long been talking of legislation to save daylight,
1873 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1874 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1875 # presumably late evening, as below), and would run until "the end of
1876 # the summer".  The discrepancy between municipal time and railroad
1877 # time was noted.
1878 
1879 # From Paul Eggert (2003-07-27):
1880 # Willett (1914-03) notes that DST "has been in operation ... in the
1881 # City of Moose Jaw, Saskatchewan, for one year."
1882 
1883 # From Paul Eggert (2019-04-26):
1884 # Chris Pearce's book "The Great Daylight Saving Time Controversy" (2017)
1885 # says that Regina observed DST in 1914-1917.  No dates and times,
1886 # unfortunately.  It also says that in 1914 Saskatoon observed DST
1887 # from 1 June to 6 July, and that DST was also tried out in Davidson,
1888 # Melfort, and Prince Albert.
1889 
1890 # From Paul Eggert (2006-03-22):
1891 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1892 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1893 # Other western towns (e.g. Lloydminster) are like Edmonton.
1894 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1895 # are like Winnipeg, in violation of Saskatchewan law.
1896 
1897 # From W. Jones (1992-11-06):
1898 # The. . .below is based on information I got from our law library, the
1899 # provincial archives, and the provincial Community Services department.
1900 # A precise history would require digging through newspaper archives, and
1901 # since you didn't say what you wanted, I didn't bother.
1902 #
1903 # Saskatchewan is split by a time zone meridian (105W) and over the years
1904 # the boundary became pretty ragged as communities near it reevaluated
1905 # their affiliations in one direction or the other.  In 1965 a provincial
1906 # referendum favoured legislating common time practices.
1907 #
1908 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1909 # Saskatchewan 1978) was proclaimed, and established that the eastern


1932 Rule    Regina  1930    1934    -       Oct     Sun>=1       0:00    0       S
1933 Rule    Regina  1937    1941    -       Apr     Sun>=8       0:00    1:00    D
1934 Rule    Regina  1937    only    -       Oct     Sun>=8       0:00    0       S
1935 Rule    Regina  1938    only    -       Oct     Sun>=1       0:00    0       S
1936 Rule    Regina  1939    1941    -       Oct     Sun>=8       0:00    0       S
1937 Rule    Regina  1942    only    -       Feb      9      2:00    1:00    W # War
1938 Rule    Regina  1945    only    -       Aug     14      23:00u  1:00    P # Peace
1939 Rule    Regina  1945    only    -       Sep     lastSun 2:00    0       S
1940 Rule    Regina  1946    only    -       Apr     Sun>=8       2:00    1:00    D
1941 Rule    Regina  1946    only    -       Oct     Sun>=8       2:00    0       S
1942 Rule    Regina  1947    1957    -       Apr     lastSun 2:00    1:00    D
1943 Rule    Regina  1947    1957    -       Sep     lastSun 2:00    0       S
1944 Rule    Regina  1959    only    -       Apr     lastSun 2:00    1:00    D
1945 Rule    Regina  1959    only    -       Oct     lastSun 2:00    0       S
1946 #
1947 Rule    Swift   1957    only    -       Apr     lastSun 2:00    1:00    D
1948 Rule    Swift   1957    only    -       Oct     lastSun 2:00    0       S
1949 Rule    Swift   1959    1961    -       Apr     lastSun 2:00    1:00    D
1950 Rule    Swift   1959    only    -       Oct     lastSun 2:00    0       S
1951 Rule    Swift   1960    1961    -       Sep     lastSun 2:00    0       S
1952 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1953 Zone America/Regina     -6:58:36 -      LMT     1905 Sep
1954                         -7:00   Regina  M%sT    1960 Apr lastSun  2:00
1955                         -6:00   -       CST
1956 Zone America/Swift_Current -7:11:20 -   LMT     1905 Sep
1957                         -7:00   Canada  M%sT    1946 Apr lastSun  2:00
1958                         -7:00   Regina  M%sT    1950
1959                         -7:00   Swift   M%sT    1972 Apr lastSun  2:00
1960                         -6:00   -       CST
1961 
1962 
1963 # Alberta
1964 
1965 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1966 Rule    Edm     1918    1919    -       Apr     Sun>=8       2:00    1:00    D
1967 Rule    Edm     1918    only    -       Oct     27      2:00    0       S
1968 Rule    Edm     1919    only    -       May     27      2:00    0       S
1969 Rule    Edm     1920    1923    -       Apr     lastSun 2:00    1:00    D
1970 Rule    Edm     1920    only    -       Oct     lastSun 2:00    0       S
1971 Rule    Edm     1921    1923    -       Sep     lastSun 2:00    0       S
1972 Rule    Edm     1942    only    -       Feb      9      2:00    1:00    W # War
1973 Rule    Edm     1945    only    -       Aug     14      23:00u  1:00    P # Peace
1974 Rule    Edm     1945    only    -       Sep     lastSun 2:00    0       S
1975 Rule    Edm     1947    only    -       Apr     lastSun 2:00    1:00    D
1976 Rule    Edm     1947    only    -       Sep     lastSun 2:00    0       S
1977 Rule    Edm     1967    only    -       Apr     lastSun 2:00    1:00    D
1978 Rule    Edm     1967    only    -       Oct     lastSun 2:00    0       S
1979 Rule    Edm     1969    only    -       Apr     lastSun 2:00    1:00    D
1980 Rule    Edm     1969    only    -       Oct     lastSun 2:00    0       S
1981 Rule    Edm     1972    1986    -       Apr     lastSun 2:00    1:00    D
1982 Rule    Edm     1972    2006    -       Oct     lastSun 2:00    0       S
1983 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
1984 Zone America/Edmonton   -7:33:52 -      LMT     1906 Sep
1985                         -7:00   Edm     M%sT    1987
1986                         -7:00   Canada  M%sT
1987 
1988 
1989 # British Columbia
1990 
1991 # From Paul Eggert (2006-03-22):
1992 # Shanks & Pottenger write that since 1970 most of this region has
1993 # been like Vancouver.
1994 # Dawson Creek uses MST.  Much of east BC is like Edmonton.
1995 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1996 
1997 # It seems though that (re: Creston) is not entirely correct:
1998 
1999 # From Chris Walton (2011-12-01):
2000 # There are two areas within the Canadian province of British Columbia
2001 # that do not currently observe daylight saving:
2002 # a) The Creston Valley (includes the town of Creston and surrounding area)
2003 # b) The eastern half of the Peace River Regional District


2056 # From Tim Parenti (2015-09-23):
2057 # This requires a new zone for the Northern Rockies Regional Municipality,
2058 # America/Fort_Nelson.  The resolution of 2014-12-08 was reached following a
2059 # 2014-11-15 poll with nearly 75% support.  Effectively, the municipality has
2060 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
2061 # 2015-03-08.
2062 #
2063 # From Paul Eggert (2015-09-23):
2064 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
2065 
2066 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2067 Rule    Vanc    1918    only    -       Apr     14      2:00    1:00    D
2068 Rule    Vanc    1918    only    -       Oct     27      2:00    0       S
2069 Rule    Vanc    1942    only    -       Feb      9      2:00    1:00    W # War
2070 Rule    Vanc    1945    only    -       Aug     14      23:00u  1:00    P # Peace
2071 Rule    Vanc    1945    only    -       Sep     30      2:00    0       S
2072 Rule    Vanc    1946    1986    -       Apr     lastSun 2:00    1:00    D
2073 Rule    Vanc    1946    only    -       Oct     13      2:00    0       S
2074 Rule    Vanc    1947    1961    -       Sep     lastSun 2:00    0       S
2075 Rule    Vanc    1962    2006    -       Oct     lastSun 2:00    0       S
2076 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2077 Zone America/Vancouver  -8:12:28 -      LMT     1884
2078                         -8:00   Vanc    P%sT    1987
2079                         -8:00   Canada  P%sT
2080 Zone America/Dawson_Creek -8:00:56 -    LMT     1884
2081                         -8:00   Canada  P%sT    1947
2082                         -8:00   Vanc    P%sT    1972 Aug 30  2:00
2083                         -7:00   -       MST
2084 Zone America/Fort_Nelson        -8:10:47 -      LMT     1884
2085                         -8:00   Vanc    P%sT    1946
2086                         -8:00   -       PST     1947
2087                         -8:00   Vanc    P%sT    1987
2088                         -8:00   Canada  P%sT    2015 Mar  8  2:00
2089                         -7:00   -       MST
2090 Zone America/Creston    -7:46:04 -      LMT     1884
2091                         -7:00   -       MST     1916 Oct 1
2092                         -8:00   -       PST     1918 Jun 2
2093                         -7:00   -       MST
2094 
2095 # Northwest Territories, Nunavut, Yukon
2096 


2127 #
2128 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
2129 #   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2130 #   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
2131 #   Yukon Interpretation Ordinance
2132 #   Yukon standard time is the local mean time at the one hundred and
2133 #   thirty-fifth meridian.
2134 #
2135 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
2136 #   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2137 #   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2138 #   Yukon Interpretation Ordinance, 1955, Chap. 16.
2139 #
2140 #     (1) Subject to this section, standard time shall be reckoned as nine
2141 #     hours behind Greenwich Time and called Yukon Standard Time.
2142 #
2143 #     (2) Notwithstanding subsection (1), the Commissioner may make regulations
2144 #     varying the manner of reckoning standard time.
2145 #
2146 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2147 #   [no online source found]
2148 #
2149 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2150 #   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2151 #   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
2152 #   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2153 #
2154 #     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2155 #     Territory on 27th January, 1966, is hereby revoked.
2156 #
2157 #     2. Yukon (East) Standard Time as defined by section 36 of the
2158 #     Interpretation Ordinance from and after mid-night on the 28th day of May,
2159 #     1967 shall be reckoned in the same manner as Pacific Standard Time, that
2160 #     is to say, eight hours behind Greenwich Time in the area of the Yukon
2161 #     Territory lying east of the 138th degree longitude west.
2162 #
2163 #     3. In the remainder of the Territory, lying west of the 138th degree
2164 #     longitude west, Yukon (West) Standard Time shall be reckoned as nine
2165 #     hours behind Greenwich Time.
2166 #
2167 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2168 #   https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2169 #   C.O. 1973/214 INTERPRETATION ACT ...
2170 #
2171 #     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2172 #     revoked.
2173 #
2174 #     2. Yukon Standard Time as defined by section 36 of the Interpretation
2175 #     Act from and after midnight on the twenty-eighth day of October, 1973
2176 #     shall be reckoned in the same manner as Pacific Standard Time, that is
2177 #     to say eight hours behind Greenwich Time.
2178 #
2179 # * O.I.C. 1980/02 INTERPRETATION ACT
2180 #   [no online source found]
2181 #
2182 # * Yukon Daylight Saving Time, YOIC 1987/56
2183 #   https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2184 #   O.I.C. 1987/056 INTERPRETATION ACT ...
2185 #
2186 #   In every year between
2187 #     (a) two o'clock in the morning in the first Sunday in April, and
2188 #     (b) two o'clock in the morning in the last Sunday in October,
2189 #   Standard Time shall be reckoned as seven hours behind Greenwich Time and
2190 #   called Yukon Daylight Saving Time.
2191 #   ...
2192 #   Dated ... 9th day of March, A.D., 1987.
2193 #
2194 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
2195 #   https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2196 #   O.I.C. 2006/127 INTERPRETATION ACT ...
2197 #
2198 #     1. In Yukon each year the time for general purposes shall be 7 hours
2199 #     behind Greenwich mean time during the period commencing at two o'clock
2200 #     in the forenoon on the second Sunday of March and ending at two o'clock


2376 # search on the weather through Env. Canada. web site"
2377 #
2378 # If I had realized the Stephanie did not live in Resolute Bay I would
2379 # never have contacted her.  I now believe that all the information I
2380 # obtained in November 2008 should be ignored...
2381 # I apologize for reporting incorrect information in 2008.
2382 
2383 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2384 Rule    NT_YK   1918    only    -       Apr     14      2:00    1:00    D
2385 Rule    NT_YK   1918    only    -       Oct     27      2:00    0       S
2386 Rule    NT_YK   1919    only    -       May     25      2:00    1:00    D
2387 Rule    NT_YK   1919    only    -       Nov      1      0:00    0       S
2388 Rule    NT_YK   1942    only    -       Feb      9      2:00    1:00    W # War
2389 Rule    NT_YK   1945    only    -       Aug     14      23:00u  1:00    P # Peace
2390 Rule    NT_YK   1945    only    -       Sep     30      2:00    0       S
2391 Rule    NT_YK   1965    only    -       Apr     lastSun 0:00    2:00    DD
2392 Rule    NT_YK   1965    only    -       Oct     lastSun 2:00    0       S
2393 Rule    NT_YK   1980    1986    -       Apr     lastSun 2:00    1:00    D
2394 Rule    NT_YK   1980    2006    -       Oct     lastSun 2:00    0       S
2395 Rule    NT_YK   1987    2006    -       Apr     Sun>=1       2:00    1:00    D
2396 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2397 # aka Panniqtuuq
2398 Zone America/Pangnirtung 0      -       -00     1921 # trading post est.
2399                         -4:00   NT_YK   A%sT    1995 Apr Sun>=1  2:00
2400                         -5:00   Canada  E%sT    1999 Oct 31  2:00
2401                         -6:00   Canada  C%sT    2000 Oct 29  2:00
2402                         -5:00   Canada  E%sT
2403 # formerly Frobisher Bay
2404 Zone America/Iqaluit    0       -       -00     1942 Aug # Frobisher Bay est.
2405                         -5:00   NT_YK   E%sT    1999 Oct 31  2:00
2406                         -6:00   Canada  C%sT    2000 Oct 29  2:00
2407                         -5:00   Canada  E%sT
2408 # aka Qausuittuq
2409 Zone America/Resolute   0       -       -00     1947 Aug 31 # Resolute founded
2410                         -6:00   NT_YK   C%sT    2000 Oct 29  2:00
2411                         -5:00   -       EST     2001 Apr  1  3:00
2412                         -6:00   Canada  C%sT    2006 Oct 29  2:00
2413                         -5:00   -       EST     2007 Mar 11  3:00
2414                         -6:00   Canada  C%sT
2415 # aka Kangiqiniq
2416 Zone America/Rankin_Inlet 0     -       -00     1957 # Rankin Inlet founded


2523 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2524 # [translated], says "summer time will ... take effect on the first Sunday
2525 # in May, and end on the last Sunday of September.
2526 
2527 # From Arthur David Olson (2001-01-25):
2528 # The 2001-01-24 traditional Washington Post contained the page one
2529 # story "Timely Issue Divides Mexicans."...
2530 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2531 # ... Mexico City Mayor López Obrador "...is threatening to keep
2532 # Mexico City and its 20 million residents on a different time than
2533 # the rest of the country..." In particular, López Obrador would abolish
2534 # observation of Daylight Saving Time.
2535 
2536 # Official statute published by the Energy Department
2537 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2538 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2539 # and Sonora with no DST.  This was reported by Jesper Nørgaard (2001-02-03).
2540 
2541 # From Paul Eggert (2001-03-03):
2542 #
2543 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html
2544 # James F. Smith writes in today's LA Times
2545 # * Sonora will continue to observe standard time.
2546 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2547 #   the Federal District will not adopt DST.
2548 # * 4 of 16 district leaders announced they'll ignore the decree.
2549 # * The decree does not affect federal-controlled facilities including
2550 #   the airport, banks, hospitals, and schools.
2551 #
2552 # For now we'll assume that the Federal District will bow to federal rules.
2553 
2554 # From Jesper Nørgaard (2001-04-01):
2555 # I found some references to the Mexican application of daylight
2556 # saving, which modifies what I had already sent you, stating earlier
2557 # that a number of northern Mexican states would go on daylight
2558 # saving. The modification reverts this to only cover Baja California
2559 # (Norte), while all other states (except Sonora, who has no daylight
2560 # saving all year) will follow the original decree of president
2561 # Vicente Fox, starting daylight saving May 6, 2001 and ending
2562 # September 30, 2001.
2563 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>


2650 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2651 #    of Quintana Roo.
2652 # 5- The islands, reefs and keys shall take their timezone from the
2653 #    longitude they are located at.
2654 
2655 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2656 Rule    Mexico  1939    only    -       Feb     5       0:00    1:00    D
2657 Rule    Mexico  1939    only    -       Jun     25      0:00    0       S
2658 Rule    Mexico  1940    only    -       Dec     9       0:00    1:00    D
2659 Rule    Mexico  1941    only    -       Apr     1       0:00    0       S
2660 Rule    Mexico  1943    only    -       Dec     16      0:00    1:00    W # War
2661 Rule    Mexico  1944    only    -       May     1       0:00    0       S
2662 Rule    Mexico  1950    only    -       Feb     12      0:00    1:00    D
2663 Rule    Mexico  1950    only    -       Jul     30      0:00    0       S
2664 Rule    Mexico  1996    2000    -       Apr     Sun>=1       2:00    1:00    D
2665 Rule    Mexico  1996    2000    -       Oct     lastSun 2:00    0       S
2666 Rule    Mexico  2001    only    -       May     Sun>=1       2:00    1:00    D
2667 Rule    Mexico  2001    only    -       Sep     lastSun 2:00    0       S
2668 Rule    Mexico  2002    max     -       Apr     Sun>=1       2:00    1:00    D
2669 Rule    Mexico  2002    max     -       Oct     lastSun 2:00    0       S
2670 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2671 # Quintana Roo; represented by Cancún
2672 Zone America/Cancun     -5:47:04 -      LMT     1922 Jan  1  0:12:56
2673                         -6:00   -       CST     1981 Dec 23
2674                         -5:00   Mexico  E%sT    1998 Aug  2  2:00
2675                         -6:00   Mexico  C%sT    2015 Feb  1  2:00
2676                         -5:00   -       EST
2677 # Campeche, Yucatán; represented by Mérida
2678 Zone America/Merida     -5:58:28 -      LMT     1922 Jan  1  0:01:32
2679                         -6:00   -       CST     1981 Dec 23
2680                         -5:00   -       EST     1982 Dec  2
2681                         -6:00   Mexico  C%sT
2682 # Coahuila, Nuevo León, Tamaulipas (near US border)
2683 # This includes the following municipalities:
2684 #   in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava,
2685 #     Guerrero, Hidalgo.
2686 #   in Nuevo León: Anáhuac, Los Aldama.
2687 #   in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2688 #     Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2689 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal,
2690 # 2016-03-12


2843 # no information
2844 
2845 ###############################################################################
2846 
2847 # Anguilla
2848 # Antigua and Barbuda
2849 # See America/Port_of_Spain.
2850 
2851 # Bahamas
2852 #
2853 # For 1899 Milne gives -5:09:29.5; round that.
2854 #
2855 # From Sue Williams (2006-12-07):
2856 # The Bahamas announced about a month ago that they plan to change their DST
2857 # rules to sync with the U.S. starting in 2007....
2858 # http://www.jonesbahamas.com/?c=45&a=10412
2859 
2860 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2861 Rule    Bahamas 1964    1975    -       Oct     lastSun 2:00    0       S
2862 Rule    Bahamas 1964    1975    -       Apr     lastSun 2:00    1:00    D
2863 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2864 Zone    America/Nassau  -5:09:30 -      LMT     1912 Mar 2
2865                         -5:00   Bahamas E%sT    1976
2866                         -5:00   US      E%sT
2867 
2868 # Barbados
2869 
2870 # For 1899 Milne gives -3:58:29.2; round that.
2871 
2872 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2873 Rule    Barb    1977    only    -       Jun     12      2:00    1:00    D
2874 Rule    Barb    1977    1978    -       Oct     Sun>=1       2:00    0       S
2875 Rule    Barb    1978    1980    -       Apr     Sun>=15      2:00    1:00    D
2876 Rule    Barb    1979    only    -       Sep     30      2:00    0       S
2877 Rule    Barb    1980    only    -       Sep     25      2:00    0       S
2878 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2879 Zone America/Barbados   -3:58:29 -      LMT     1924 # Bridgetown
2880                         -3:58:29 -      BMT     1932 # Bridgetown Mean Time
2881                         -4:00   Barb    A%sT
2882 
2883 # Belize
2884 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2885 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2886 Rule    Belize  1918    1942    -       Oct     Sun>=2       0:00    0:30    -0530
2887 Rule    Belize  1919    1943    -       Feb     Sun>=9       0:00    0       CST
2888 Rule    Belize  1973    only    -       Dec      5      0:00    1:00    CDT
2889 Rule    Belize  1974    only    -       Feb      9      0:00    0       CST
2890 Rule    Belize  1982    only    -       Dec     18      0:00    1:00    CDT
2891 Rule    Belize  1983    only    -       Feb     12      0:00    0       CST
2892 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2893 Zone    America/Belize  -5:52:48 -      LMT     1912 Apr
2894                         -6:00   Belize  %s
2895 
2896 # Bermuda
2897 
2898 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2899 # Bermuda dockyard, Ireland I; round that.
2900 
2901 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2902 
2903 # Next year, however, clocks in the US will go forward on the second Sunday
2904 # in March, until the first Sunday in November.  And, after the Time Zone
2905 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2906 # Friday, the same thing will happen in Bermuda.
2907 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2908 
2909 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2910 Zone Atlantic/Bermuda   -4:19:18 -      LMT     1930 Jan  1  2:00 # Hamilton
2911                         -4:00   -       AST     1974 Apr 28  2:00
2912                         -4:00   Canada  A%sT    1976
2913                         -4:00   US      A%sT
2914 
2915 # Cayman Is
2916 # See America/Panama.
2917 
2918 # Costa Rica
2919 
2920 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2921 
2922 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2923 Rule    CR      1979    1980    -       Feb     lastSun 0:00    1:00    D
2924 Rule    CR      1979    1980    -       Jun     Sun>=1       0:00    0       S
2925 Rule    CR      1991    1992    -       Jan     Sat>=15      0:00    1:00    D
2926 # IATA SSIM (1991-09) says the following was at 1:00;
2927 # go with Shanks & Pottenger.
2928 Rule    CR      1991    only    -       Jul      1      0:00    0       S
2929 Rule    CR      1992    only    -       Mar     15      0:00    0       S
2930 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2931 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
2932 Zone America/Costa_Rica -5:36:13 -      LMT     1890        # San José
2933                         -5:36:13 -      SJMT    1921 Jan 15 # San José Mean Time
2934                         -6:00   CR      C%sT
2935 # Coco
2936 # no information; probably like America/Costa_Rica
2937 
2938 # Cuba
2939 
2940 # From Paul Eggert (2013-02-21):
2941 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2942 # for the port, and -5:30 for meteorological observations.
2943 # For now, stick with Shanks & Pottenger.
2944 
2945 # From Arthur David Olson (1999-03-29):
2946 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2947 # the Cuban National Team and the Baltimore Orioles was carried live on
2948 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2949 # During the game, play-by-play announcer Jim Hunter noted that
2950 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2951 # Time today."  (The "two hour" remark referred to losing one hour of


3117 Rule    Cuba    1981    1985    -       May     Sun>=5       0:00    1:00    D
3118 Rule    Cuba    1986    1989    -       Mar     Sun>=14      0:00    1:00    D
3119 Rule    Cuba    1990    1997    -       Apr     Sun>=1       0:00    1:00    D
3120 Rule    Cuba    1991    1995    -       Oct     Sun>=8       0:00s   0       S
3121 Rule    Cuba    1996    only    -       Oct      6      0:00s   0       S
3122 Rule    Cuba    1997    only    -       Oct     12      0:00s   0       S
3123 Rule    Cuba    1998    1999    -       Mar     lastSun 0:00s   1:00    D
3124 Rule    Cuba    1998    2003    -       Oct     lastSun 0:00s   0       S
3125 Rule    Cuba    2000    2003    -       Apr     Sun>=1       0:00s   1:00    D
3126 Rule    Cuba    2004    only    -       Mar     lastSun 0:00s   1:00    D
3127 Rule    Cuba    2006    2010    -       Oct     lastSun 0:00s   0       S
3128 Rule    Cuba    2007    only    -       Mar     Sun>=8       0:00s   1:00    D
3129 Rule    Cuba    2008    only    -       Mar     Sun>=15      0:00s   1:00    D
3130 Rule    Cuba    2009    2010    -       Mar     Sun>=8       0:00s   1:00    D
3131 Rule    Cuba    2011    only    -       Mar     Sun>=15      0:00s   1:00    D
3132 Rule    Cuba    2011    only    -       Nov     13      0:00s   0       S
3133 Rule    Cuba    2012    only    -       Apr     1       0:00s   1:00    D
3134 Rule    Cuba    2012    max     -       Nov     Sun>=1       0:00s   0       S
3135 Rule    Cuba    2013    max     -       Mar     Sun>=8       0:00s   1:00    D
3136 
3137 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3138 Zone    America/Havana  -5:29:28 -      LMT     1890
3139                         -5:29:36 -      HMT     1925 Jul 19 12:00 # Havana MT
3140                         -5:00   Cuba    C%sT
3141 
3142 # Dominica
3143 # See America/Port_of_Spain.
3144 
3145 # Dominican Republic
3146 
3147 # From Steffen Thorsen (2000-10-30):
3148 # Enrique Morales reported to me that the Dominican Republic has changed the
3149 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3150 # http://www.listin.com.do/antes/261000/republica/princi.html
3151 
3152 # From Paul Eggert (2000-12-04):
3153 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3154 
3155 # From Rives McDow (2000-12-01):
3156 # Dominican Republic changed its mind and presidential decree on Tuesday,
3157 # November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
3158 # Dominican Republic will be reverting to 8 hours from the International Date
3159 # Line, and will not be using DST in the foreseeable future.  The reason they
3160 # decided to use DST was to be in synch with Puerto Rico, who was also going
3161 # to implement DST.  When Puerto Rico didn't implement DST, the president
3162 # decided to revert.
3163 
3164 
3165 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3166 Rule    DR      1966    only    -       Oct     30      0:00    1:00    EDT
3167 Rule    DR      1967    only    -       Feb     28      0:00    0       EST
3168 Rule    DR      1969    1973    -       Oct     lastSun 0:00    0:30    -0430
3169 Rule    DR      1970    only    -       Feb     21      0:00    0       EST
3170 Rule    DR      1971    only    -       Jan     20      0:00    0       EST
3171 Rule    DR      1972    1974    -       Jan     21      0:00    0       EST
3172 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3173 Zone America/Santo_Domingo -4:39:36 -   LMT     1890
3174                         -4:40   -       SDMT    1933 Apr  1 12:00 # S. Dom. MT
3175                         -5:00   DR      %s      1974 Oct 27
3176                         -4:00   -       AST     2000 Oct 29  2:00
3177                         -5:00   US      E%sT    2000 Dec  3  1:00
3178                         -4:00   -       AST
3179 
3180 # El Salvador
3181 
3182 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3183 Rule    Salv    1987    1988    -       May     Sun>=1       0:00    1:00    D
3184 Rule    Salv    1987    1988    -       Sep     lastSun 0:00    0       S
3185 # There are too many San Salvadors elsewhere, so use America/El_Salvador
3186 # instead of America/San_Salvador.
3187 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3188 Zone America/El_Salvador -5:56:48 -     LMT     1921 # San Salvador
3189                         -6:00   Salv    C%sT
3190 
3191 # Grenada
3192 # Guadeloupe
3193 # St Barthélemy
3194 # St Martin (French part)
3195 # See America/Port_of_Spain.
3196 
3197 # Guatemala
3198 #
3199 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3200 # Diario Co Latino, at
3201 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3202 # says in an article dated 2006-04-19 that the Guatemalan government had
3203 # decided on that date to advance official time by 60 minutes, to lessen the
3204 # impact of the elevated cost of oil....  Daylight saving time will last from
3205 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3206 # From Paul Eggert (2006-06-22):
3207 # The Ministry of Energy and Mines, press release CP-15/2006
3208 # (2006-04-19), says DST ends at 24:00.  See
3209 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3210 
3211 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3212 Rule    Guat    1973    only    -       Nov     25      0:00    1:00    D
3213 Rule    Guat    1974    only    -       Feb     24      0:00    0       S
3214 Rule    Guat    1983    only    -       May     21      0:00    1:00    D
3215 Rule    Guat    1983    only    -       Sep     22      0:00    0       S
3216 Rule    Guat    1991    only    -       Mar     23      0:00    1:00    D
3217 Rule    Guat    1991    only    -       Sep      7      0:00    0       S
3218 Rule    Guat    2006    only    -       Apr     30      0:00    1:00    D
3219 Rule    Guat    2006    only    -       Oct      1      0:00    0       S
3220 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3221 Zone America/Guatemala  -6:02:04 -      LMT     1918 Oct 5
3222                         -6:00   Guat    C%sT
3223 
3224 # Haiti
3225 # From Gwillim Law (2005-04-15):
3226 # Risto O. Nykänen wrote me that Haiti is now on DST.
3227 # I searched for confirmation, and I found a press release
3228 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3229 # <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
3230 #
3231 #  "The Prime Minister's Communication Office notifies the public in general
3232 #   and the press in particular that, following a decision of the Interior
3233 #   Ministry and the Territorial Collectivities [I suppose that means the
3234 #   provinces], Haiti will move to Eastern Daylight Time in the night from next
3235 #   Saturday the 2nd to Sunday the 3rd.
3236 #
3237 #  "Consequently, the Prime Minister's Communication Office wishes to inform
3238 #   the population that the country's clocks will be set forward one hour
3239 #   starting at midnight.  This provision will hold until the last Saturday in
3240 #   October 2005.


3286 # From Steffen Thorsen (2017-03-12):
3287 # We have received 4 mails from different people telling that Haiti
3288 # has started DST again today, and this source seems to confirm that,
3289 # I have not been able to find a more authoritative source:
3290 # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3291 
3292 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3293 Rule    Haiti   1983    only    -       May     8       0:00    1:00    D
3294 Rule    Haiti   1984    1987    -       Apr     lastSun 0:00    1:00    D
3295 Rule    Haiti   1983    1987    -       Oct     lastSun 0:00    0       S
3296 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3297 # Go with IATA.
3298 Rule    Haiti   1988    1997    -       Apr     Sun>=1       1:00s   1:00    D
3299 Rule    Haiti   1988    1997    -       Oct     lastSun 1:00s   0       S
3300 Rule    Haiti   2005    2006    -       Apr     Sun>=1       0:00    1:00    D
3301 Rule    Haiti   2005    2006    -       Oct     lastSun 0:00    0       S
3302 Rule    Haiti   2012    2015    -       Mar     Sun>=8       2:00    1:00    D
3303 Rule    Haiti   2012    2015    -       Nov     Sun>=1       2:00    0       S
3304 Rule    Haiti   2017    max     -       Mar     Sun>=8       2:00    1:00    D
3305 Rule    Haiti   2017    max     -       Nov     Sun>=1       2:00    0       S
3306 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3307 Zone America/Port-au-Prince -4:49:20 -  LMT     1890
3308                         -4:49   -       PPMT    1917 Jan 24 12:00 # P-a-P MT
3309                         -5:00   Haiti   E%sT
3310 
3311 # Honduras
3312 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3313 
3314 # From Paul Eggert (2006-05-05):
3315 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3316 # saying Honduras will start using DST midnight Saturday, effective 4
3317 # months until September.  La Tribuna reported today
3318 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3319 # of Honduras, refused to back down on this.
3320 
3321 # From Jesper Nørgaard Welen (2006-08-08):
3322 # It seems that Honduras has returned from DST to standard time this Monday at
3323 # 00:00 hours (prolonging Sunday to 25 hours duration).
3324 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3325 
3326 # From Paul Eggert (2006-08-08):
3327 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3328 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3329 # It mentions executive decree 18-2006.
3330 
3331 # From Steffen Thorsen (2006-08-17):
3332 # Honduras will observe DST from 2007 to 2009, exact dates are not
3333 # published, I have located this authoritative source:
3334 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
3335 
3336 # From Steffen Thorsen (2007-03-30):
3337 # http://www.laprensahn.com/pais_nota.php?id04962=7386
3338 # So it seems that Honduras will not enter DST this year....
3339 
3340 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3341 Rule    Hond    1987    1988    -       May     Sun>=1       0:00    1:00    D
3342 Rule    Hond    1987    1988    -       Sep     lastSun 0:00    0       S
3343 Rule    Hond    2006    only    -       May     Sun>=1       0:00    1:00    D
3344 Rule    Hond    2006    only    -       Aug     Mon>=1       0:00    0       S
3345 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3346 Zone America/Tegucigalpa -5:48:52 -     LMT     1921 Apr
3347                         -6:00   Hond    C%sT
3348 #
3349 # Great Swan I ceded by US to Honduras in 1972
3350 
3351 # Jamaica
3352 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3353 # unspecified official document, and says "This time is used throughout the
3354 # island".  Go with Milne.  Round to the nearest second as required by zic.
3355 #
3356 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3357 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3358 # Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
3359 # Manley's supporters associated this act with Manley's nickname "Joshua"
3360 # (recall that in the Bible the sun stood still at Joshua's request),
3361 # and with the Rod of Correction which Manley said he had received from
3362 # Haile Selassie, Emperor of Ethiopia.  See:
3363 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3364 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3365 #
3366 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3367 Zone    America/Jamaica -5:07:10 -      LMT     1890        # Kingston
3368                         -5:07:10 -      KMT     1912 Feb    # Kingston Mean Time
3369                         -5:00   -       EST     1974
3370                         -5:00   US      E%sT    1984
3371                         -5:00   -       EST
3372 
3373 # Martinique
3374 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3375 Zone America/Martinique -4:04:20 -      LMT     1890        # Fort-de-France
3376                         -4:04:20 -      FFMT    1911 May    # Fort-de-France MT
3377                         -4:00   -       AST     1980 Apr  6
3378                         -4:00   1:00    ADT     1980 Sep 28
3379                         -4:00   -       AST
3380 
3381 # Montserrat
3382 # See America/Port_of_Spain.
3383 
3384 # Nicaragua
3385 #
3386 # This uses Shanks & Pottenger for times before 2005.
3387 #
3388 # From Steffen Thorsen (2005-04-12):
3389 # I've got reports from 8 different people that Nicaragua just started
3390 # DST on Sunday 2005-04-10, in order to save energy because of
3391 # expensive petroleum.  The exact end date for DST is not yet
3392 # announced, only "September" but some sites also say "mid-September".
3393 # Some background information is available on the President's official site:
3394 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm


3418 # From Jesper Nørgaard Welen (2006-05-05):
3419 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3420 # (my informal translation)
3421 # By order of the president of the republic, Enrique Bolaños, Nicaragua
3422 # advanced by sixty minutes their official time, yesterday at 2 in the
3423 # morning, and will stay that way until 30th of September.
3424 #
3425 # From Jesper Nørgaard Welen (2006-09-30):
3426 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3427 # My informal translation runs:
3428 # The natural sun time is restored in all the national territory, in that the
3429 # time is returned one hour at 01:00 am of October 1 of 2006.
3430 #
3431 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3432 Rule    Nic     1979    1980    -       Mar     Sun>=16      0:00    1:00    D
3433 Rule    Nic     1979    1980    -       Jun     Mon>=23      0:00    0       S
3434 Rule    Nic     2005    only    -       Apr     10      0:00    1:00    D
3435 Rule    Nic     2005    only    -       Oct     Sun>=1       0:00    0       S
3436 Rule    Nic     2006    only    -       Apr     30      2:00    1:00    D
3437 Rule    Nic     2006    only    -       Oct     Sun>=1       1:00    0       S
3438 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3439 Zone    America/Managua -5:45:08 -      LMT     1890
3440                         -5:45:12 -      MMT     1934 Jun 23 # Managua Mean Time?
3441                         -6:00   -       CST     1973 May
3442                         -5:00   -       EST     1975 Feb 16
3443                         -6:00   Nic     C%sT    1992 Jan  1  4:00
3444                         -5:00   -       EST     1992 Sep 24
3445                         -6:00   -       CST     1993
3446                         -5:00   -       EST     1997
3447                         -6:00   Nic     C%sT
3448 
3449 # Panama
3450 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3451 Zone    America/Panama  -5:18:08 -      LMT     1890
3452                         -5:19:36 -      CMT     1908 Apr 22 # Colón Mean Time
3453                         -5:00   -       EST
3454 Link America/Panama America/Cayman
3455 
3456 # Puerto Rico
3457 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3458 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3459 Zone America/Puerto_Rico -4:24:25 -     LMT     1899 Mar 28 12:00 # San Juan
3460                         -4:00   -       AST     1942 May  3
3461                         -4:00   US      A%sT    1946
3462                         -4:00   -       AST
3463 
3464 # St Kitts-Nevis
3465 # St Lucia
3466 # See America/Port_of_Spain.
3467 
3468 # St Pierre and Miquelon
3469 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3470 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3471 Zone America/Miquelon   -3:44:40 -      LMT     1911 May 15 # St Pierre
3472                         -4:00   -       AST     1980 May
3473                         -3:00   -       -03     1987
3474                         -3:00   Canada  -03/-02
3475 
3476 # St Vincent and the Grenadines
3477 # See America/Port_of_Spain.
3478 
3479 # Turks and Caicos
3480 #
3481 # From Chris Dunn in
3482 # https://bugs.debian.org/415007
3483 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3484 # daylight saving dates for time changes have been adjusted to match
3485 # the recent U.S. change of dates.
3486 #
3487 # From Brian Inglis (2007-04-28):
3488 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3489 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3490 # rows before that there is an out of date entry for Oct:


3496 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round.  See:
3497 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3498 # Model this as a switch from EST/EDT to AST ...
3499 # From Chris Walton (2014-11-04):
3500 # ... the TCI government appears to have delayed the switch to
3501 # "permanent daylight saving time" by one year....
3502 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3503 #
3504 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3505 # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3506 # during the summer months and Standard Time, also known as Local
3507 # Time, during the winter months with effect from April 2018 ...
3508 # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3509 #
3510 # From Paul Eggert (2017-08-26):
3511 # The date of effect of the spring 2018 change appears to be March 11,
3512 # which makes more sense.  See: Hamilton D. Time change back
3513 # by March 2018 for TCI. Magnetic Media. 2017-08-25.
3514 # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3515 #
3516 # Zone  NAME            STDOFF  RULES   FORMAT  [UNTIL]
3517 Zone America/Grand_Turk -4:44:32 -      LMT     1890
3518                         -5:07:10 -      KMT     1912 Feb # Kingston Mean Time
3519                         -5:00   -       EST     1979
3520                         -5:00   US      E%sT    2015 Nov Sun>=1 2:00
3521                         -4:00   -       AST     2018 Mar 11 3:00
3522                         -5:00   US      E%sT
3523 
3524 # British Virgin Is
3525 # Virgin Is
3526 # See America/Port_of_Spain.
3527 
3528 
3529 # Local Variables:
3530 # coding: utf-8
3531 # End:


  99 #       valuable if I stay in bed after the sun has risen.  As an admirer
 100 #       of moonlight I resent the bossy insistence of those who want to
 101 #       reduce my time for enjoying it.  At the back of the Daylight Saving
 102 #       scheme I detect the bony, blue-fingered hand of Puritanism, eager
 103 #       to push people into bed earlier, and get them up earlier, to make
 104 #       them healthy, wealthy and wise in spite of themselves.
 105 #
 106 #        -- Robertson Davies, The diary of Samuel Marchbanks,
 107 #          Clarke, Irwin (1947), XIX, Sunday
 108 #
 109 # For more about the first ten years of DST in the United States, see
 110 # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
 111 # (Carnegie Library of Pittsburgh, 1927).
 112 # http://www.clpgh.org/exhibit/dst.html
 113 #
 114 # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
 115 # However, DST was imposed by the Standard Time Act of 1918, which
 116 # was the first nationwide legal time standard, and apparently
 117 # time was just called "Standard Time" or "Daylight Saving Time".
 118 
 119 # From Arthur David Olson:
 120 # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
 121 # See, for example, the front page of the Saturday, 1974-10-26
 122 # and Sunday, 1974-10-27 editions of the Washington Post.























 123 
 124 # From Arthur David Olson:
 125 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
 126 # Daylight Saving Time in the US was by local option, except during wartime.
 127 
 128 # From Arthur David Olson (2000-09-25):
 129 # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
 130 # In the introduction, Oboler spoke of "Eastern Peace Time."
 131 # An AltaVista search turned up:
 132 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
 133 # "When the time is announced over the radio now, it is 'Eastern Peace
 134 # Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
 135 # (August 1945) by way of confirmation.
 136 #
 137 # From Paul Eggert (2017-09-23):
 138 # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
 139 
 140 # From Joseph Gallant citing
 141 # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
 142 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set


 158 # importance."
 159 #
 160 # On Aug. 14, stalling while talking steadily into the NBC networks' open
 161 # microphone, St. John heard five bells and waited only to hear a sixth bell,
 162 # before announcing confidently: "Ladies and gentlemen, World War II is over.
 163 # The Japanese have agreed to our surrender terms."
 164 #
 165 # He had scored a 20-second scoop on other broadcasters.
 166 
 167 # From Arthur David Olson (2005-08-22):
 168 # Paul has been careful to use the "US" rules only in those locations
 169 # that are part of the United States; this reflects the real scope of
 170 # U.S. government action.  So even though the "US" rules have changed
 171 # in the latest release, other countries won't be affected.
 172 
 173 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
 174 Rule    US      1918    1919    -       Mar     lastSun 2:00    1:00    D
 175 Rule    US      1918    1919    -       Oct     lastSun 2:00    0       S
 176 Rule    US      1942    only    -       Feb     9       2:00    1:00    W # War
 177 Rule    US      1945    only    -       Aug     14      23:00u  1:00    P # Peace
 178 Rule    US      1945    only    -       Sep     lastSun 2:00    0       S
 179 Rule    US      1967    2006    -       Oct     lastSun 2:00    0       S
 180 Rule    US      1967    1973    -       Apr     lastSun 2:00    1:00    D
 181 Rule    US      1974    only    -       Jan     6       2:00    1:00    D
 182 Rule    US      1975    only    -       Feb     23      2:00    1:00    D
 183 Rule    US      1976    1986    -       Apr     lastSun 2:00    1:00    D
 184 Rule    US      1987    2006    -       Apr     Sun>=1       2:00    1:00    D
 185 Rule    US      2007    max     -       Mar     Sun>=8       2:00    1:00    D
 186 Rule    US      2007    max     -       Nov     Sun>=1       2:00    0       S
 187 
 188 # From Arthur David Olson, 2005-12-19
 189 # We generate the files specified below to guard against old files with
 190 # obsolete information being left in the time zone binary directory.
 191 # We limit the list to names that have appeared in previous versions of
 192 # this time zone package.
 193 # We do these as separate Zones rather than as Links to avoid problems if
 194 # a particular place changes whether it observes DST.
 195 # We put these specifications here in the northamerica file both to
 196 # increase the chances that they'll actually get compiled and to
 197 # avoid the need to duplicate the US rules in another file.
 198 
 199 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 200 Zone    EST              -5:00  -       EST
 201 Zone    MST              -7:00  -       MST
 202 Zone    HST             -10:00  -       HST
 203 Zone    EST5EDT          -5:00  US      E%sT
 204 Zone    CST6CDT          -6:00  US      C%sT
 205 Zone    MST7MDT          -7:00  US      M%sT
 206 Zone    PST8PDT          -8:00  US      P%sT
 207 
 208 # From U. S. Naval Observatory (1989-01-19):
 209 # USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
 210 # USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
 211 # USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
 212 # USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
 213 # USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
 214 # USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
 215 # USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
 216 # USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
 217 # USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
 218 # USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
 219 # USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W


 336 # Four cities are involved.  The two not mentioned above are Smiths Station
 337 # and Valley.  Barbara Brooks, Valley's assistant treasurer, heard it started
 338 # because West Point Pepperell textile mills were in Alabama while the
 339 # corporate office was in Georgia, and residents voted to keep Eastern
 340 # time even after the mills closed.  See: Kazek K. Did you know which
 341 # Alabama towns are in a different time zone?  al.com 2017-02-06.
 342 # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
 343 
 344 # From Paul Eggert (2014-09-06):
 345 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
 346 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
 347 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch.  Round to the
 348 # nearest second.
 349 
 350 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 351 Rule    NYC     1920    only    -       Mar     lastSun 2:00    1:00    D
 352 Rule    NYC     1920    only    -       Oct     lastSun 2:00    0       S
 353 Rule    NYC     1921    1966    -       Apr     lastSun 2:00    1:00    D
 354 Rule    NYC     1921    1954    -       Sep     lastSun 2:00    0       S
 355 Rule    NYC     1955    1966    -       Oct     lastSun 2:00    0       S
 356 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 357 Zone America/New_York   -4:56:02 -      LMT     1883 Nov 18 12:03:58
 358                         -5:00   US      E%sT    1920
 359                         -5:00   NYC     E%sT    1942
 360                         -5:00   US      E%sT    1946
 361                         -5:00   NYC     E%sT    1967
 362                         -5:00   US      E%sT
 363 
 364 # US central time, represented by Chicago
 365 
 366 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
 367 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
 368 # Washington counties), Illinois, western Indiana
 369 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
 370 # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
 371 # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
 372 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
 373 # western Tennessee, most of Texas, Wisconsin
 374 
 375 # From Paul Eggert (2018-01-07):
 376 # In 1869 the Chicago Astronomical Society contracted with the city to keep


 396 # Statue 175 closer in synch with the US Congress' intent....
 397 # https://docs.legis.wisconsin.gov/2007/related/acts/3
 398 
 399 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
 400 # Fort Pierre is technically located in the Mountain time zone as is
 401 # the rest of Stanley County.  Most of Stanley County and Fort Pierre
 402 # uses the Central time zone due to doing most of their business in
 403 # Pierre so it simplifies schedules.  I have lived in Stanley County
 404 # all my life and it has been that way since I can remember.  (43 years!)
 405 #
 406 # From Paul Eggert (2015-12-25):
 407 # Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
 408 
 409 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 410 Rule    Chicago 1920    only    -       Jun     13      2:00    1:00    D
 411 Rule    Chicago 1920    1921    -       Oct     lastSun 2:00    0       S
 412 Rule    Chicago 1921    only    -       Mar     lastSun 2:00    1:00    D
 413 Rule    Chicago 1922    1966    -       Apr     lastSun 2:00    1:00    D
 414 Rule    Chicago 1922    1954    -       Sep     lastSun 2:00    0       S
 415 Rule    Chicago 1955    1966    -       Oct     lastSun 2:00    0       S
 416 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 417 Zone America/Chicago    -5:50:36 -      LMT     1883 Nov 18 12:09:24
 418                         -6:00   US      C%sT    1920
 419                         -6:00   Chicago C%sT    1936 Mar  1  2:00
 420                         -5:00   -       EST     1936 Nov 15  2:00
 421                         -6:00   Chicago C%sT    1942
 422                         -6:00   US      C%sT    1946
 423                         -6:00   Chicago C%sT    1967
 424                         -6:00   US      C%sT
 425 # Oliver County, ND switched from mountain to central time on 1992-10-25.
 426 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
 427                         -7:00   US      M%sT    1992 Oct 25  2:00
 428                         -6:00   US      C%sT
 429 # Morton County, ND, switched from mountain to central time on
 430 # 2003-10-26, except for the area around Mandan which was already central time.
 431 # See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
 432 # Officially this switch also included part of Sioux County, and
 433 # Jones, Mellette, and Todd Counties in South Dakota;
 434 # but in practice these other counties were already observing central time.
 435 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
 436 Zone America/North_Dakota/New_Salem -6:45:39 - LMT      1883 Nov 18 12:14:21


 464 #
 465 # From Paul Eggert (2018-10-25):
 466 # On 1921-03-04 federal law placed all of Texas into the central time zone.
 467 # However, El Paso ignored the law for decades and continued to observe
 468 # mountain time, on the grounds that that's what they had always done
 469 # and they weren't about to let the federal government tell them what to do.
 470 # Eventually the federal government gave in and changed the law on
 471 # 1970-04-10 to match what El Paso was actually doing.  Although
 472 # that's slightly after our 1970 cutoff, there is no need to create a
 473 # separate zone for El Paso since they were ignoring the law anyway.  See:
 474 # Long T. El Pasoans were time rebels, fought to stay in Mountain zone.
 475 # El Paso Times. 2018-10-24 06:40 -06.
 476 # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/
 477 #
 478 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 479 Rule    Denver  1920    1921    -       Mar     lastSun 2:00    1:00    D
 480 Rule    Denver  1920    only    -       Oct     lastSun 2:00    0       S
 481 Rule    Denver  1921    only    -       May     22      2:00    0       S
 482 Rule    Denver  1965    1966    -       Apr     lastSun 2:00    1:00    D
 483 Rule    Denver  1965    1966    -       Oct     lastSun 2:00    0       S
 484 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 485 Zone America/Denver     -6:59:56 -      LMT     1883 Nov 18 12:00:04
 486                         -7:00   US      M%sT    1920
 487                         -7:00   Denver  M%sT    1942
 488                         -7:00   US      M%sT    1946
 489                         -7:00   Denver  M%sT    1967
 490                         -7:00   US      M%sT
 491 
 492 # US Pacific time, represented by Los Angeles
 493 #
 494 # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
 495 # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
 496 # north of the Salmon River, and the towns of Burgdorf and Warren),
 497 # Nevada (except West Wendover), Oregon (except the northern ¾ of
 498 # Malheur county), and Washington
 499 
 500 # From Paul Eggert (2016-08-20):
 501 # In early February 1948, in response to California's electricity shortage,
 502 # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
 503 # causing electric clocks to lose six minutes per day.  (This did not change
 504 # legal time, and is not part of the data here.)  See:


 517 #   to speculate that the objections to Daylight Saving Time were one important
 518 #   factor in the defeat of the Dewey-Warren Presidential ticket in California.
 519 #     -- Ross, p 25
 520 #
 521 # On December 8 the governor exercised the option, setting the date to January 1
 522 # (LA Times 1948-12-09).  The transition time was 02:00 (LA Times 1949-01-01).
 523 #
 524 # Despite the controversy, in 1949 California voters approved Proposition 12,
 525 # which established DST from April's last Sunday at 01:00 until September's
 526 # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
 527 # the fall-back date to October's last Sunday. See:
 528 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
 529 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
 530 #
 531 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 532 Rule    CA      1948    only    -       Mar     14      2:01    1:00    D
 533 Rule    CA      1949    only    -       Jan      1      2:00    0       S
 534 Rule    CA      1950    1966    -       Apr     lastSun 1:00    1:00    D
 535 Rule    CA      1950    1961    -       Sep     lastSun 2:00    0       S
 536 Rule    CA      1962    1966    -       Oct     lastSun 2:00    0       S
 537 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 538 Zone America/Los_Angeles -7:52:58 -     LMT     1883 Nov 18 12:07:02
 539                         -8:00   US      P%sT    1946
 540                         -8:00   CA      P%sT    1967
 541                         -8:00   US      P%sT
 542 
 543 # Alaska
 544 # AK%sT is the modern abbreviation for -09 per USNO.
 545 #
 546 # From Paul Eggert (2017-06-15):
 547 # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
 548 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
 549 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
 550 # Russian forts and fleet at Sitka fired salutes to mark the ceremony of
 551 # formal transfer.  See the Sacramento Daily Union (1867-11-14), p 3, col 2.
 552 # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
 553 # Sitka workers did not change their calendars until Sunday, 1867-10-20,
 554 # and so celebrated two Sundays that week.  See: Ahllund T (tr Hallamaa P).
 555 # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
 556 # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
 557 # Include only the time zone part of this transition, ignoring the switch


 605 # From Arthur David Olson (2011-02-09):
 606 # I just spoke by phone with a staff member at the Metlakatla Indian
 607 # Community office (using contact information available at
 608 # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
 609 # It's shortly after 1:00 here on the east coast of the United States;
 610 # the staffer said it was shortly after 10:00 there. When I asked whether
 611 # that meant they were on Pacific time, they said no - they were on their
 612 # own time. I asked about daylight saving; they said it wasn't used. I
 613 # did not inquire about practices in the past.
 614 
 615 # From Arthur David Olson (2011-08-17):
 616 # For lack of better information, assume that Metlakatla's
 617 # abandonment of use of daylight saving resulted from the 1983 vote.
 618 
 619 # From Steffen Thorsen (2015-11-09):
 620 # It seems Metlakatla did go off PST on Sunday, November 1, changing
 621 # their time to AKST and are going to follow Alaska's DST, switching
 622 # between AKST and AKDT from now on....
 623 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
 624 
 625 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]




















 626 Zone America/Juneau      15:02:19 -     LMT     1867 Oct 19 15:33:32
 627                          -8:57:41 -     LMT     1900 Aug 20 12:00
 628                          -8:00  -       PST     1942
 629                          -8:00  US      P%sT    1946
 630                          -8:00  -       PST     1969
 631                          -8:00  US      P%sT    1980 Apr 27  2:00
 632                          -9:00  US      Y%sT    1980 Oct 26  2:00
 633                          -8:00  US      P%sT    1983 Oct 30  2:00
 634                          -9:00  US      Y%sT    1983 Nov 30
 635                          -9:00  US      AK%sT
 636 Zone America/Sitka       14:58:47 -     LMT     1867 Oct 19 15:30
 637                          -9:01:13 -     LMT     1900 Aug 20 12:00
 638                          -8:00  -       PST     1942
 639                          -8:00  US      P%sT    1946
 640                          -8:00  -       PST     1969
 641                          -8:00  US      P%sT    1983 Oct 30  2:00
 642                          -9:00  US      Y%sT    1983 Nov 30
 643                          -9:00  US      AK%sT
 644 Zone America/Metlakatla  15:13:42 -     LMT     1867 Oct 19 15:44:55
 645                          -8:46:18 -     LMT     1900 Aug 20 12:00
 646                          -8:00  -       PST     1942
 647                          -8:00  US      P%sT    1946
 648                          -8:00  -       PST     1969
 649                          -8:00  US      P%sT    1983 Oct 30  2:00
 650                          -8:00  -       PST     2015 Nov  1  2:00


 651                          -9:00  US      AK%sT
 652 Zone America/Yakutat     14:41:05 -     LMT     1867 Oct 19 15:12:18
 653                          -9:18:55 -     LMT     1900 Aug 20 12:00
 654                          -9:00  -       YST     1942
 655                          -9:00  US      Y%sT    1946
 656                          -9:00  -       YST     1969
 657                          -9:00  US      Y%sT    1983 Nov 30
 658                          -9:00  US      AK%sT
 659 Zone America/Anchorage   14:00:24 -     LMT     1867 Oct 19 14:31:37
 660                          -9:59:36 -     LMT     1900 Aug 20 12:00
 661                         -10:00  -       AST     1942
 662                         -10:00  US      A%sT    1967 Apr
 663                         -10:00  -       AHST    1969
 664                         -10:00  US      AH%sT   1983 Oct 30  2:00
 665                          -9:00  US      Y%sT    1983 Nov 30
 666                          -9:00  US      AK%sT
 667 Zone America/Nome        12:58:22 -     LMT     1867 Oct 19 13:29:35
 668                         -11:01:38 -     LMT     1900 Aug 20 12:00
 669                         -11:00  -       NST     1942
 670                         -11:00  US      N%sT    1946


 723 # and Act 163 (approved 21 May 1933)."
 724 
 725 # From Arthur David Olson (2011-01-19):
 726 # The following is from "Laws of the Territory of Hawaii Passed by the
 727 # Seventeenth Legislature: Regular Session 1933," available (as of
 728 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
 729 # 90...At 2 o'clock ante meridian of the last Sunday in April of each
 730 # year, the standard time of this Territory shall be advanced one
 731 # hour...This Act shall take effect upon its approval. Approved this 26th
 732 # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
 733 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
 734 # hereby repealed...This Act shall take effect upon its approval, upon
 735 # which date the standard time of this Territory shall be restored to
 736 # that existing immediately prior to the taking effect of said Act 90.
 737 # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
 738 # of the Territory of Hawaii."
 739 #
 740 # Note that 1933-05-21 was a Sunday.
 741 # We're left to guess the time of day when Act 163 was approved; guess noon.
 742 
 743 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 744 Zone Pacific/Honolulu   -10:31:26 -     LMT     1896 Jan 13 12:00
 745                         -10:30  -       HST     1933 Apr 30  2:00
 746                         -10:30  1:00    HDT     1933 May 21 12:00
 747                         -10:30  US      H%sT    1947 Jun  8  2:00
 748                         -10:00  -       HST
 749 
 750 # Now we turn to US areas that have diverged from the consensus since 1970.
 751 
 752 # Arizona mostly uses MST.
 753 
 754 # From Paul Eggert (2002-10-20):
 755 #
 756 # The information in the rest of this paragraph is derived from the
 757 # Daylight Saving Time web page
 758 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
 759 # maintained by the Arizona State Library, Archives and Public Records.
 760 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
 761 # time, but by federal law railroads, airlines, bus lines, military
 762 # personnel, and some engaged in interstate commerce continued to
 763 # observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
 764 # Gazette says that was the date the law changed, and that 04-01 was
 765 # the date the state's clocks would change.  In 1945 the State of
 766 # Arizona used standard time all year, again with exceptions only as
 767 # mandated by federal law.  Arizona observed DST in 1967, but Arizona
 768 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
 769 #
 770 # Shanks says the 1944 experiment came to an end on 1944-03-17.
 771 # Go with the Arizona State Library instead.
 772 
 773 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 774 Zone America/Phoenix    -7:28:18 -      LMT     1883 Nov 18 11:31:42
 775                         -7:00   US      M%sT    1944 Jan  1  0:01
 776                         -7:00   -       MST     1944 Apr  1  0:01
 777                         -7:00   US      M%sT    1944 Oct  1  0:01
 778                         -7:00   -       MST     1967
 779                         -7:00   US      M%sT    1968 Mar 21
 780                         -7:00   -       MST
 781 # From Arthur David Olson (1988-02-13):
 782 # A writer from the Inter Tribal Council of Arizona, Inc.,
 783 # notes in private correspondence dated 1987-12-28 that "Presently, only the
 784 # Navajo Nation participates in the Daylight Saving Time policy, due to its
 785 # large size and location in three states."  (The "only" means that other
 786 # tribal nations don't use DST.)
 787 #
 788 # From Paul Eggert (2013-08-26):
 789 # See America/Denver for a zone appropriate for the Navajo Nation.
 790 
 791 # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
 792 # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
 793 # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
 794 # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
 795 # Teton, Twin Falls, Valley, Washington counties, and the southern
 796 # quarter of Idaho county) and eastern Oregon (most of Malheur County)
 797 # switched four weeks late in 1974.
 798 #
 799 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 800 Zone America/Boise      -7:44:49 -      LMT     1883 Nov 18 12:15:11
 801                         -8:00   US      P%sT    1923 May 13  2:00
 802                         -7:00   US      M%sT    1974
 803                         -7:00   -       MST     1974 Feb  3  2:00
 804                         -7:00   US      M%sT
 805 
 806 # Indiana
 807 #
 808 # For a map of Indiana's time zone regions, see:
 809 # https://en.wikipedia.org/wiki/Time_in_Indiana
 810 #
















 811 # From Paul Eggert (2007-08-17):
 812 # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
 813 # with the following exceptions:
 814 #
 815 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
 816 #   Vanderburgh, and Warrick counties have been like America/Chicago.
 817 #
 818 # - Dearborn and Ohio counties have been like America/New_York.
 819 #
 820 # - Clark, Floyd, and Harrison counties have been like
 821 #   America/Kentucky/Louisville.
 822 #
 823 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
 824 #   and Switzerland counties have their own time zone histories as noted below.
 825 #
 826 # Shanks partitioned Indiana into 345 regions, each with its own time history,
 827 # and wrote "Even newspaper reports present contradictory information."
 828 # Those Hoosiers!  Such a flighty and changeable people!
 829 # Fortunately, most of the complexity occurred before our cutoff date of 1970.
 830 #


 835 # From Paul Eggert (2014-06-26):
 836 # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
 837 # says "DOT is relocating the time zone boundary in Indiana to move Starke,
 838 # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
 839 # Eastern Time Zone to the Central Time Zone.... The effective date of
 840 # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
 841 # changeover date from standard time to Daylight Saving Time."
 842 # Strictly speaking, this meant the affected counties changed their
 843 # clocks twice that night, but this obviously was in error.  The intent
 844 # was that 01:59:59 EST be followed by 02:00:00 CDT.
 845 
 846 # From Gwillim Law (2007-02-10):
 847 # The Associated Press has been reporting that Pulaski County, Indiana is
 848 # going to switch from Central to Eastern Time on March 11, 2007....
 849 # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
 850 
 851 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 852 Rule Indianapolis 1941  only    -       Jun     22      2:00    1:00    D
 853 Rule Indianapolis 1941  1954    -       Sep     lastSun 2:00    0       S
 854 Rule Indianapolis 1946  1954    -       Apr     lastSun 2:00    1:00    D
 855 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 856 Zone America/Indiana/Indianapolis -5:44:38 - LMT        1883 Nov 18 12:15:22
 857                         -6:00   US      C%sT    1920
 858                         -6:00 Indianapolis C%sT 1942
 859                         -6:00   US      C%sT    1946
 860                         -6:00 Indianapolis C%sT 1955 Apr 24  2:00
 861                         -5:00   -       EST     1957 Sep 29  2:00
 862                         -6:00   -       CST     1958 Apr 27  2:00
 863                         -5:00   -       EST     1969
 864                         -5:00   US      E%sT    1971
 865                         -5:00   -       EST     2006
 866                         -5:00   US      E%sT
 867 #
 868 # Eastern Crawford County, Indiana, left its clocks alone in 1974,
 869 # as well as from 1976 through 2005.
 870 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 871 Rule    Marengo 1951    only    -       Apr     lastSun 2:00    1:00    D
 872 Rule    Marengo 1951    only    -       Sep     lastSun 2:00    0       S
 873 Rule    Marengo 1954    1960    -       Apr     lastSun 2:00    1:00    D
 874 Rule    Marengo 1954    1960    -       Sep     lastSun 2:00    0       S
 875 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 876 Zone America/Indiana/Marengo -5:45:23 - LMT     1883 Nov 18 12:14:37
 877                         -6:00   US      C%sT    1951
 878                         -6:00   Marengo C%sT    1961 Apr 30  2:00
 879                         -5:00   -       EST     1969
 880                         -5:00   US      E%sT    1974 Jan  6  2:00
 881                         -6:00   1:00    CDT     1974 Oct 27  2:00
 882                         -5:00   US      E%sT    1976
 883                         -5:00   -       EST     2006
 884                         -5:00   US      E%sT
 885 #
 886 # Daviess, Dubois, Knox, and Martin Counties, Indiana,
 887 # switched from eastern to central time in April 2006, then switched back
 888 # in November 2007.
 889 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 890 Rule Vincennes  1946    only    -       Apr     lastSun 2:00    1:00    D
 891 Rule Vincennes  1946    only    -       Sep     lastSun 2:00    0       S
 892 Rule Vincennes  1953    1954    -       Apr     lastSun 2:00    1:00    D
 893 Rule Vincennes  1953    1959    -       Sep     lastSun 2:00    0       S
 894 Rule Vincennes  1955    only    -       May      1      0:00    1:00    D
 895 Rule Vincennes  1956    1963    -       Apr     lastSun 2:00    1:00    D
 896 Rule Vincennes  1960    only    -       Oct     lastSun 2:00    0       S
 897 Rule Vincennes  1961    only    -       Sep     lastSun 2:00    0       S
 898 Rule Vincennes  1962    1963    -       Oct     lastSun 2:00    0       S
 899 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 900 Zone America/Indiana/Vincennes -5:50:07 - LMT   1883 Nov 18 12:09:53
 901                         -6:00   US      C%sT    1946
 902                         -6:00 Vincennes C%sT    1964 Apr 26  2:00
 903                         -5:00   -       EST     1969
 904                         -5:00   US      E%sT    1971
 905                         -5:00   -       EST     2006 Apr  2  2:00
 906                         -6:00   US      C%sT    2007 Nov  4  2:00
 907                         -5:00   US      E%sT
 908 #
 909 # Perry County, Indiana, switched from eastern to central time in April 2006.
 910 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 911 Rule Perry      1946    only    -       Apr     lastSun 2:00    1:00    D
 912 Rule Perry      1946    only    -       Sep     lastSun 2:00    0       S
 913 Rule Perry      1953    1954    -       Apr     lastSun 2:00    1:00    D
 914 Rule Perry      1953    1959    -       Sep     lastSun 2:00    0       S
 915 Rule Perry      1955    only    -       May      1      0:00    1:00    D
 916 Rule Perry      1956    1963    -       Apr     lastSun 2:00    1:00    D
 917 Rule Perry      1960    only    -       Oct     lastSun 2:00    0       S
 918 Rule Perry      1961    only    -       Sep     lastSun 2:00    0       S
 919 Rule Perry      1962    1963    -       Oct     lastSun 2:00    0       S
 920 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 921 Zone America/Indiana/Tell_City -5:47:03 - LMT   1883 Nov 18 12:12:57
 922                         -6:00   US      C%sT    1946
 923                         -6:00 Perry     C%sT    1964 Apr 26  2:00
 924                         -5:00   -       EST     1969
 925                         -5:00   US      E%sT    1971
 926                         -5:00   -       EST     2006 Apr  2  2:00
 927                         -6:00   US      C%sT
 928 #
 929 # Pike County, Indiana moved from central to eastern time in 1977,
 930 # then switched back in 2006, then switched back again in 2007.
 931 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 932 Rule    Pike    1955    only    -       May      1      0:00    1:00    D
 933 Rule    Pike    1955    1960    -       Sep     lastSun 2:00    0       S
 934 Rule    Pike    1956    1964    -       Apr     lastSun 2:00    1:00    D
 935 Rule    Pike    1961    1964    -       Oct     lastSun 2:00    0       S
 936 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 937 Zone America/Indiana/Petersburg -5:49:07 - LMT  1883 Nov 18 12:10:53
 938                         -6:00   US      C%sT    1955
 939                         -6:00   Pike    C%sT    1965 Apr 25  2:00
 940                         -5:00   -       EST     1966 Oct 30  2:00
 941                         -6:00   US      C%sT    1977 Oct 30  2:00
 942                         -5:00   -       EST     2006 Apr  2  2:00
 943                         -6:00   US      C%sT    2007 Nov  4  2:00
 944                         -5:00   US      E%sT
 945 #
 946 # Starke County, Indiana moved from central to eastern time in 1991,
 947 # then switched back in 2006.
 948 # From Arthur David Olson (1991-10-28):
 949 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
 950 # notes that Starke County switched from Central time to Eastern time as of
 951 # 1991-10-27.
 952 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 953 Rule    Starke  1947    1961    -       Apr     lastSun 2:00    1:00    D
 954 Rule    Starke  1947    1954    -       Sep     lastSun 2:00    0       S
 955 Rule    Starke  1955    1956    -       Oct     lastSun 2:00    0       S
 956 Rule    Starke  1957    1958    -       Sep     lastSun 2:00    0       S
 957 Rule    Starke  1959    1961    -       Oct     lastSun 2:00    0       S
 958 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 959 Zone America/Indiana/Knox -5:46:30 -    LMT     1883 Nov 18 12:13:30
 960                         -6:00   US      C%sT    1947
 961                         -6:00   Starke  C%sT    1962 Apr 29  2:00
 962                         -5:00   -       EST     1963 Oct 27  2:00
 963                         -6:00   US      C%sT    1991 Oct 27  2:00
 964                         -5:00   -       EST     2006 Apr  2  2:00
 965                         -6:00   US      C%sT
 966 #
 967 # Pulaski County, Indiana, switched from eastern to central time in
 968 # April 2006 and then switched back in March 2007.
 969 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
 970 Rule    Pulaski 1946    1960    -       Apr     lastSun 2:00    1:00    D
 971 Rule    Pulaski 1946    1954    -       Sep     lastSun 2:00    0       S
 972 Rule    Pulaski 1955    1956    -       Oct     lastSun 2:00    0       S
 973 Rule    Pulaski 1957    1960    -       Sep     lastSun 2:00    0       S
 974 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 975 Zone America/Indiana/Winamac -5:46:25 - LMT     1883 Nov 18 12:13:35
 976                         -6:00   US      C%sT    1946
 977                         -6:00   Pulaski C%sT    1961 Apr 30  2:00
 978                         -5:00   -       EST     1969
 979                         -5:00   US      E%sT    1971
 980                         -5:00   -       EST     2006 Apr  2  2:00
 981                         -6:00   US      C%sT    2007 Mar 11  2:00
 982                         -5:00   US      E%sT
 983 #
 984 # Switzerland County, Indiana, did not observe DST from 1973 through 2005.
 985 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
 986 Zone America/Indiana/Vevay -5:40:16 -   LMT     1883 Nov 18 12:19:44
 987                         -6:00   US      C%sT    1954 Apr 25  2:00
 988                         -5:00   -       EST     1969
 989                         -5:00   US      E%sT    1973
 990                         -5:00   -       EST     2006
 991                         -5:00   US      E%sT
 992 
 993 # From Paul Eggert (2018-03-20):
 994 # The Louisville & Nashville Railroad's 1883-11-18 change occurred at
 995 # 10:00 old local time; train were supposed to come to a standstill
 996 # for precisely 18 minutes.  See Bartky Fig. 1 (page 50).  It is not
 997 # clear how this matched civil time in Louisville, so for now continue
 998 # to assume Louisville switched at noon new local time, like New York.
 999 #
1000 # Part of Kentucky left its clocks alone in 1974.
1001 # This also includes Clark, Floyd, and Harrison counties in Indiana.
1002 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1003 Rule Louisville 1921    only    -       May     1       2:00    1:00    D
1004 Rule Louisville 1921    only    -       Sep     1       2:00    0       S
1005 Rule Louisville 1941    1961    -       Apr     lastSun 2:00    1:00    D
1006 Rule Louisville 1941    only    -       Sep     lastSun 2:00    0       S
1007 Rule Louisville 1946    only    -       Jun     2       2:00    0       S
1008 Rule Louisville 1950    1955    -       Sep     lastSun 2:00    0       S
1009 Rule Louisville 1956    1960    -       Oct     lastSun 2:00    0       S
1010 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1011 Zone America/Kentucky/Louisville -5:43:02 -     LMT     1883 Nov 18 12:16:58
1012                         -6:00   US      C%sT    1921
1013                         -6:00 Louisville C%sT   1942
1014                         -6:00   US      C%sT    1946
1015                         -6:00 Louisville C%sT   1961 Jul 23  2:00
1016                         -5:00   -       EST     1968
1017                         -5:00   US      E%sT    1974 Jan  6  2:00
1018                         -6:00   1:00    CDT     1974 Oct 27  2:00
1019                         -5:00   US      E%sT
1020 #
1021 # Wayne County, Kentucky
1022 #
1023 # From Lake Cumberland LIFE
1024 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
1025 # (1999-01-29) via WKYM-101.7:
1026 # Clinton County has joined Wayne County in asking the DoT to change from
1027 # the Central to the Eastern time zone....  The Wayne County government made
1028 # the same request in December.  And while Russell County officials have not
1029 # taken action, the majority of respondents to a poll conducted there in
1030 # August indicated they would like to change to "fast time" also.


1096 # one hour in 1914."  This change is not in Shanks.  We have no more
1097 # info, so omit this for now.
1098 #
1099 # From Paul Eggert (2017-07-26):
1100 # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01
1101 # until 10-29 00:01, I now see multiple reports that this is incorrect.
1102 # For example, according to a 50-year anniversary report about the 1967
1103 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time
1104 # the last fly ball of the doubleheader settled into the glove of leftfielder
1105 # Lenny Green, it was after 7 p.m.  Detroit did not observe daylight saving
1106 # time, so light was already starting to fail.  Twilight was made even deeper
1107 # by billowing columns of smoke that ascended in an unbroken wall north of the
1108 # ballpark."  See: Dow B. Detroit '67: As violence unfolded, Tigers played two
1109 # at home vs. Yankees. Detroit Free Press 2017-07-23.
1110 # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/
1111 #
1112 # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1113 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1114 Rule    Detroit 1948    only    -       Apr     lastSun 2:00    1:00    D
1115 Rule    Detroit 1948    only    -       Sep     lastSun 2:00    0       S
1116 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1117 Zone America/Detroit    -5:32:11 -      LMT     1905
1118                         -6:00   -       CST     1915 May 15  2:00
1119                         -5:00   -       EST     1942
1120                         -5:00   US      E%sT    1946
1121                         -5:00   Detroit E%sT    1973
1122                         -5:00   US      E%sT    1975
1123                         -5:00   -       EST     1975 Apr 27  2:00
1124                         -5:00   US      E%sT
1125 #
1126 # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1127 # switched from EST to CST/CDT in 1973.
1128 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER
1129 Rule Menominee  1946    only    -       Apr     lastSun 2:00    1:00    D
1130 Rule Menominee  1946    only    -       Sep     lastSun 2:00    0       S
1131 Rule Menominee  1966    only    -       Apr     lastSun 2:00    1:00    D
1132 Rule Menominee  1966    only    -       Oct     lastSun 2:00    0       S
1133 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1134 Zone America/Menominee  -5:50:27 -      LMT     1885 Sep 18 12:00
1135                         -6:00   US      C%sT    1946
1136                         -6:00 Menominee C%sT    1969 Apr 27  2:00
1137                         -5:00   -       EST     1973 Apr 29  2:00
1138                         -6:00   US      C%sT
1139 
1140 # Navassa
1141 # administered by the US Fish and Wildlife Service
1142 # claimed by US under the provisions of the 1856 Guano Islands Act
1143 # also claimed by Haiti
1144 # occupied 1857/1900 by the Navassa Phosphate Co
1145 # US lighthouse 1917/1996-09
1146 # currently uninhabited
1147 # see Mark Fineman, "An Isle Rich in Guano and Discord",
1148 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1149 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
1150 
1151 ################################################################################
1152 
1153 


1347 # changes to the Newfoundland Standard Time Act have been proclaimed.
1348 # The change in the Act stipulates that the change from Daylight Savings
1349 # Time to Standard Time and from Standard Time to Daylight Savings Time
1350 # now occurs at 2:00AM.
1351 # ...
1352 # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1353 # ...
1354 # MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
1355 # Office of the Chief Information Officer
1356 # Executive Council
1357 # Government of Newfoundland & Labrador
1358 
1359 Rule    StJohns 1987    only    -       Apr     Sun>=1       0:01    1:00    D
1360 Rule    StJohns 1987    2006    -       Oct     lastSun 0:01    0       S
1361 Rule    StJohns 1988    only    -       Apr     Sun>=1       0:01    2:00    DD
1362 Rule    StJohns 1989    2006    -       Apr     Sun>=1       0:01    1:00    D
1363 Rule    StJohns 2007    2011    -       Mar     Sun>=8       0:01    1:00    D
1364 Rule    StJohns 2007    2010    -       Nov     Sun>=1       0:01    0       S
1365 #
1366 # St John's has an apostrophe, but Posix file names can't have apostrophes.
1367 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1368 Zone America/St_Johns   -3:30:52 -      LMT     1884
1369                         -3:30:52 StJohns N%sT   1918
1370                         -3:30:52 Canada N%sT    1919
1371                         -3:30:52 StJohns N%sT   1935 Mar 30
1372                         -3:30   StJohns N%sT    1942 May 11
1373                         -3:30   Canada  N%sT    1946
1374                         -3:30   StJohns N%sT    2011 Nov
1375                         -3:30   Canada  N%sT
1376 
1377 # most of east Labrador
1378 
1379 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1380 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1381 Zone America/Goose_Bay  -4:01:40 -      LMT     1884 # Happy Valley-Goose Bay
1382                         -3:30:52 -      NST     1918
1383                         -3:30:52 Canada N%sT    1919
1384                         -3:30:52 -      NST     1935 Mar 30
1385                         -3:30   -       NST     1936
1386                         -3:30   StJohns N%sT    1942 May 11
1387                         -3:30   Canada  N%sT    1946
1388                         -3:30   StJohns N%sT    1966 Mar 15  2:00
1389                         -4:00   StJohns A%sT    2011 Nov
1390                         -4:00   Canada  A%sT
1391 
1392 
1393 # west Labrador, Nova Scotia, Prince Edward I
1394 
1395 # From Brian Inglis (2015-07-20):
1396 # From the historical weather station records available at:
1397 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1398 # Sydney shares the same time history as Glace Bay, so was
1399 # likely to be the same across the island....
1400 # Sydney, as the capital and most populous location, or Cape Breton, would


1434 Rule    Halifax 1933    only    -       Apr     30      0:00    1:00    D
1435 Rule    Halifax 1933    only    -       Oct      2      0:00    0       S
1436 Rule    Halifax 1934    only    -       May     20      0:00    1:00    D
1437 Rule    Halifax 1934    only    -       Sep     16      0:00    0       S
1438 Rule    Halifax 1935    only    -       Jun      2      0:00    1:00    D
1439 Rule    Halifax 1935    only    -       Sep     30      0:00    0       S
1440 Rule    Halifax 1936    only    -       Jun      1      0:00    1:00    D
1441 Rule    Halifax 1936    only    -       Sep     14      0:00    0       S
1442 Rule    Halifax 1937    1938    -       May     Sun>=1       0:00    1:00    D
1443 Rule    Halifax 1937    1941    -       Sep     Mon>=24      0:00    0       S
1444 Rule    Halifax 1939    only    -       May     28      0:00    1:00    D
1445 Rule    Halifax 1940    1941    -       May     Sun>=1       0:00    1:00    D
1446 Rule    Halifax 1946    1949    -       Apr     lastSun 2:00    1:00    D
1447 Rule    Halifax 1946    1949    -       Sep     lastSun 2:00    0       S
1448 Rule    Halifax 1951    1954    -       Apr     lastSun 2:00    1:00    D
1449 Rule    Halifax 1951    1954    -       Sep     lastSun 2:00    0       S
1450 Rule    Halifax 1956    1959    -       Apr     lastSun 2:00    1:00    D
1451 Rule    Halifax 1956    1959    -       Sep     lastSun 2:00    0       S
1452 Rule    Halifax 1962    1973    -       Apr     lastSun 2:00    1:00    D
1453 Rule    Halifax 1962    1973    -       Oct     lastSun 2:00    0       S
1454 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1455 Zone America/Halifax    -4:14:24 -      LMT     1902 Jun 15
1456                         -4:00   Halifax A%sT    1918
1457                         -4:00   Canada  A%sT    1919
1458                         -4:00   Halifax A%sT    1942 Feb  9  2:00s
1459                         -4:00   Canada  A%sT    1946
1460                         -4:00   Halifax A%sT    1974
1461                         -4:00   Canada  A%sT
1462 Zone America/Glace_Bay  -3:59:48 -      LMT     1902 Jun 15
1463                         -4:00   Canada  A%sT    1953
1464                         -4:00   Halifax A%sT    1954
1465                         -4:00   -       AST     1972
1466                         -4:00   Halifax A%sT    1974
1467                         -4:00   Canada  A%sT
1468 
1469 # New Brunswick
1470 
1471 # From Paul Eggert (2007-01-31):
1472 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1473 # says they changed at 00:01 through 2006, and
1474 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1475 # clear that this was the case since at least 1993.
1476 # For now, assume it started in 1993.
1477 
1478 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1479 Rule    Moncton 1933    1935    -       Jun     Sun>=8       1:00    1:00    D
1480 Rule    Moncton 1933    1935    -       Sep     Sun>=8       1:00    0       S
1481 Rule    Moncton 1936    1938    -       Jun     Sun>=1       1:00    1:00    D
1482 Rule    Moncton 1936    1938    -       Sep     Sun>=1       1:00    0       S
1483 Rule    Moncton 1939    only    -       May     27      1:00    1:00    D
1484 Rule    Moncton 1939    1941    -       Sep     Sat>=21      1:00    0       S
1485 Rule    Moncton 1940    only    -       May     19      1:00    1:00    D
1486 Rule    Moncton 1941    only    -       May      4      1:00    1:00    D
1487 Rule    Moncton 1946    1972    -       Apr     lastSun 2:00    1:00    D
1488 Rule    Moncton 1946    1956    -       Sep     lastSun 2:00    0       S
1489 Rule    Moncton 1957    1972    -       Oct     lastSun 2:00    0       S
1490 Rule    Moncton 1993    2006    -       Apr     Sun>=1       0:01    1:00    D
1491 Rule    Moncton 1993    2006    -       Oct     lastSun 0:01    0       S
1492 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1493 Zone America/Moncton    -4:19:08 -      LMT     1883 Dec  9
1494                         -5:00   -       EST     1902 Jun 15
1495                         -4:00   Canada  A%sT    1933
1496                         -4:00   Moncton A%sT    1942
1497                         -4:00   Canada  A%sT    1946
1498                         -4:00   Moncton A%sT    1973
1499                         -4:00   Canada  A%sT    1993
1500                         -4:00   Moncton A%sT    2007
1501                         -4:00   Canada  A%sT
1502 
1503 # Quebec
1504 
1505 # From Paul Eggert (2015-03-24):
1506 # See America/Toronto for most of Quebec, including Montreal.
1507 #
1508 # Matthews and Vincent (1998) also write that Quebec east of the -63
1509 # meridian is supposed to observe AST, but residents as far east as
1510 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1511 # The Quebec department of justice writes in
1512 # "The situation in Minganie and Basse-Côte-Nord"
1513 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1514 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1515 # observes Atlantic standard time all year round.
1516 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1517 # says this common practice was codified into law as of 2007.
1518 # For lack of better info, guess this practice began around 1970, contra to
1519 # Shanks & Pottenger who have this region observing AST/ADT.
1520 
1521 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1522 Zone America/Blanc-Sablon -3:48:28 -    LMT     1884
1523                         -4:00   Canada  A%sT    1970
1524                         -4:00   -       AST
1525 
1526 # Ontario
1527 
1528 # From Paul Eggert (2006-07-09):
1529 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1530 # Toronto.
1531 # Thunder Bay skipped DST in 1973.
1532 # Many smaller locales did not observe peacetime DST until 1974;
1533 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1534 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1535 
1536 # From Mark Brader (2003-07-26):
1537 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1538 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1539 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1540 # have already done so.  In Orillia DST was to run until Saturday,
1541 # 1912-08-31 (no time mentioned), but it was met with considerable


1669 # Manitoba              Not used.
1670 # Saskatchewan          In Regina only.
1671 # Alberta               Not used.
1672 # British Columbia      Not used.
1673 #
1674 #   With some exceptions, the use of daylight saving may be said to be limited
1675 # to those cities and towns lying between Quebec city and Windsor, Ont.
1676 
1677 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1678 Rule    Toronto 1919    only    -       Mar     30      23:30   1:00    D
1679 Rule    Toronto 1919    only    -       Oct     26      0:00    0       S
1680 Rule    Toronto 1920    only    -       May      2      2:00    1:00    D
1681 Rule    Toronto 1920    only    -       Sep     26      0:00    0       S
1682 Rule    Toronto 1921    only    -       May     15      2:00    1:00    D
1683 Rule    Toronto 1921    only    -       Sep     15      2:00    0       S
1684 Rule    Toronto 1922    1923    -       May     Sun>=8       2:00    1:00    D
1685 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1686 # was meant.
1687 Rule    Toronto 1922    1926    -       Sep     Sun>=15      2:00    0       S
1688 Rule    Toronto 1924    1927    -       May     Sun>=1       2:00    1:00    D
1689 # The 1927-to-1939 rules can be expressed more simply as
1690 # Rule  Toronto 1927    1937    -       Sep     Sun>=25      2:00    0       S
1691 # Rule  Toronto 1928    1937    -       Apr     Sun>=25      2:00    1:00    D
1692 # Rule  Toronto 1938    1940    -       Apr     lastSun 2:00    1:00    D
1693 # Rule  Toronto 1938    1939    -       Sep     lastSun 2:00    0       S
1694 # The rules below avoid use of Sun>=25
1695 # (which pre-2004 versions of zic cannot handle).
1696 Rule    Toronto 1927    1932    -       Sep     lastSun 2:00    0       S
1697 Rule    Toronto 1928    1931    -       Apr     lastSun 2:00    1:00    D
1698 Rule    Toronto 1932    only    -       May     1       2:00    1:00    D
1699 Rule    Toronto 1933    1940    -       Apr     lastSun 2:00    1:00    D
1700 Rule    Toronto 1933    only    -       Oct     1       2:00    0       S
1701 Rule    Toronto 1934    1939    -       Sep     lastSun 2:00    0       S
1702 Rule    Toronto 1945    1946    -       Sep     lastSun 2:00    0       S
1703 Rule    Toronto 1946    only    -       Apr     lastSun 2:00    1:00    D
1704 Rule    Toronto 1947    1949    -       Apr     lastSun 0:00    1:00    D
1705 Rule    Toronto 1947    1948    -       Sep     lastSun 0:00    0       S
1706 Rule    Toronto 1949    only    -       Nov     lastSun 0:00    0       S
1707 Rule    Toronto 1950    1973    -       Apr     lastSun 2:00    1:00    D
1708 Rule    Toronto 1950    only    -       Nov     lastSun 2:00    0       S
1709 Rule    Toronto 1951    1956    -       Sep     lastSun 2:00    0       S
1710 # Shanks & Pottenger say Toronto ended DST a week early in 1971,
1711 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1712 # is wrong, and that he had confirmed it by checking the 1971-10-30
1713 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1714 Rule    Toronto 1957    1973    -       Oct     lastSun 2:00    0       S
1715 
1716 # From Paul Eggert (2003-07-27):
1717 # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1718 # Port Arthur, Ontario, the principle of the Bill has been in
1719 # operation for the past three years, and in the City of Moose Jaw,
1720 # Saskatchewan, for one year."
1721 
1722 # From David Bryan via Tory Tronrud, Director/Curator,
1723 # Thunder Bay Museum (2003-11-12):
1724 # There is some suggestion, however, that, by-law or not, daylight
1725 # savings time was being practiced in Fort William and Port Arthur
1726 # before 1909.... [I]n 1910, the line between the Eastern and Central
1727 # Time Zones was permanently moved about two hundred miles west to
1728 # include the Thunder Bay area....  When Canada adopted daylight
1729 # savings time in 1916, Fort William and Port Arthur, having done so
1730 # already, did not change their clocks....  During the Second World
1731 # War,... [t]he cities agreed to implement DST during the summer
1732 # months for the remainder of the war years.
1733 
1734 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1735 Zone America/Toronto    -5:17:32 -      LMT     1895
1736                         -5:00   Canada  E%sT    1919
1737                         -5:00   Toronto E%sT    1942 Feb  9  2:00s
1738                         -5:00   Canada  E%sT    1946
1739                         -5:00   Toronto E%sT    1974
1740                         -5:00   Canada  E%sT
1741 Zone America/Thunder_Bay -5:57:00 -     LMT     1895
1742                         -6:00   -       CST     1910
1743                         -5:00   -       EST     1942
1744                         -5:00   Canada  E%sT    1970
1745                         -5:00   Toronto E%sT    1973
1746                         -5:00   -       EST     1974
1747                         -5:00   Canada  E%sT
1748 Zone America/Nipigon    -5:53:04 -      LMT     1895
1749                         -5:00   Canada  E%sT    1940 Sep 29
1750                         -5:00   1:00    EDT     1942 Feb  9  2:00s
1751                         -5:00   Canada  E%sT
1752 Zone America/Rainy_River -6:18:16 -     LMT     1895
1753                         -6:00   Canada  C%sT    1940 Sep 29
1754                         -6:00   1:00    CDT     1942 Feb  9  2:00s


1789 Rule    Winn    1937    only    -       May     16      2:00    1:00    D
1790 Rule    Winn    1937    only    -       Sep     26      2:00    0       S
1791 Rule    Winn    1942    only    -       Feb      9      2:00    1:00    W # War
1792 Rule    Winn    1945    only    -       Aug     14      23:00u  1:00    P # Peace
1793 Rule    Winn    1945    only    -       Sep     lastSun 2:00    0       S
1794 Rule    Winn    1946    only    -       May     12      2:00    1:00    D
1795 Rule    Winn    1946    only    -       Oct     13      2:00    0       S
1796 Rule    Winn    1947    1949    -       Apr     lastSun 2:00    1:00    D
1797 Rule    Winn    1947    1949    -       Sep     lastSun 2:00    0       S
1798 Rule    Winn    1950    only    -       May      1      2:00    1:00    D
1799 Rule    Winn    1950    only    -       Sep     30      2:00    0       S
1800 Rule    Winn    1951    1960    -       Apr     lastSun 2:00    1:00    D
1801 Rule    Winn    1951    1958    -       Sep     lastSun 2:00    0       S
1802 Rule    Winn    1959    only    -       Oct     lastSun 2:00    0       S
1803 Rule    Winn    1960    only    -       Sep     lastSun 2:00    0       S
1804 Rule    Winn    1963    only    -       Apr     lastSun 2:00    1:00    D
1805 Rule    Winn    1963    only    -       Sep     22      2:00    0       S
1806 Rule    Winn    1966    1986    -       Apr     lastSun 2:00s   1:00    D
1807 Rule    Winn    1966    2005    -       Oct     lastSun 2:00s   0       S
1808 Rule    Winn    1987    2005    -       Apr     Sun>=1       2:00s   1:00    D
1809 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1810 Zone America/Winnipeg   -6:28:36 -      LMT     1887 Jul 16
1811                         -6:00   Winn    C%sT    2006
1812                         -6:00   Canada  C%sT
1813 
1814 
1815 # Saskatchewan
1816 
1817 # From Mark Brader (2003-07-26):
1818 # The first actual adoption of DST in Canada was at the municipal
1819 # level.  As the [Toronto] Star put it (1912-06-07), "While people
1820 # elsewhere have long been talking of legislation to save daylight,
1821 # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1822 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1823 # presumably late evening, as below), and would run until "the end of
1824 # the summer".  The discrepancy between municipal time and railroad
1825 # time was noted.
1826 
1827 # From Paul Eggert (2003-07-27):
1828 # Willett (1914-03) notes that DST "has been in operation ... in the
1829 # City of Moose Jaw, Saskatchewan, for one year."
1830 







1831 # From Paul Eggert (2006-03-22):
1832 # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1833 # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1834 # Other western towns (e.g. Lloydminster) are like Edmonton.
1835 # Matthews and Vincent (1998) write that Denare Beach and Creighton
1836 # are like Winnipeg, in violation of Saskatchewan law.
1837 
1838 # From W. Jones (1992-11-06):
1839 # The. . .below is based on information I got from our law library, the
1840 # provincial archives, and the provincial Community Services department.
1841 # A precise history would require digging through newspaper archives, and
1842 # since you didn't say what you wanted, I didn't bother.
1843 #
1844 # Saskatchewan is split by a time zone meridian (105W) and over the years
1845 # the boundary became pretty ragged as communities near it reevaluated
1846 # their affiliations in one direction or the other.  In 1965 a provincial
1847 # referendum favoured legislating common time practices.
1848 #
1849 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1850 # Saskatchewan 1978) was proclaimed, and established that the eastern


1873 Rule    Regina  1930    1934    -       Oct     Sun>=1       0:00    0       S
1874 Rule    Regina  1937    1941    -       Apr     Sun>=8       0:00    1:00    D
1875 Rule    Regina  1937    only    -       Oct     Sun>=8       0:00    0       S
1876 Rule    Regina  1938    only    -       Oct     Sun>=1       0:00    0       S
1877 Rule    Regina  1939    1941    -       Oct     Sun>=8       0:00    0       S
1878 Rule    Regina  1942    only    -       Feb      9      2:00    1:00    W # War
1879 Rule    Regina  1945    only    -       Aug     14      23:00u  1:00    P # Peace
1880 Rule    Regina  1945    only    -       Sep     lastSun 2:00    0       S
1881 Rule    Regina  1946    only    -       Apr     Sun>=8       2:00    1:00    D
1882 Rule    Regina  1946    only    -       Oct     Sun>=8       2:00    0       S
1883 Rule    Regina  1947    1957    -       Apr     lastSun 2:00    1:00    D
1884 Rule    Regina  1947    1957    -       Sep     lastSun 2:00    0       S
1885 Rule    Regina  1959    only    -       Apr     lastSun 2:00    1:00    D
1886 Rule    Regina  1959    only    -       Oct     lastSun 2:00    0       S
1887 #
1888 Rule    Swift   1957    only    -       Apr     lastSun 2:00    1:00    D
1889 Rule    Swift   1957    only    -       Oct     lastSun 2:00    0       S
1890 Rule    Swift   1959    1961    -       Apr     lastSun 2:00    1:00    D
1891 Rule    Swift   1959    only    -       Oct     lastSun 2:00    0       S
1892 Rule    Swift   1960    1961    -       Sep     lastSun 2:00    0       S
1893 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1894 Zone America/Regina     -6:58:36 -      LMT     1905 Sep
1895                         -7:00   Regina  M%sT    1960 Apr lastSun  2:00
1896                         -6:00   -       CST
1897 Zone America/Swift_Current -7:11:20 -   LMT     1905 Sep
1898                         -7:00   Canada  M%sT    1946 Apr lastSun  2:00
1899                         -7:00   Regina  M%sT    1950
1900                         -7:00   Swift   M%sT    1972 Apr lastSun  2:00
1901                         -6:00   -       CST
1902 
1903 
1904 # Alberta
1905 
1906 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
1907 Rule    Edm     1918    1919    -       Apr     Sun>=8       2:00    1:00    D
1908 Rule    Edm     1918    only    -       Oct     27      2:00    0       S
1909 Rule    Edm     1919    only    -       May     27      2:00    0       S
1910 Rule    Edm     1920    1923    -       Apr     lastSun 2:00    1:00    D
1911 Rule    Edm     1920    only    -       Oct     lastSun 2:00    0       S
1912 Rule    Edm     1921    1923    -       Sep     lastSun 2:00    0       S
1913 Rule    Edm     1942    only    -       Feb      9      2:00    1:00    W # War
1914 Rule    Edm     1945    only    -       Aug     14      23:00u  1:00    P # Peace
1915 Rule    Edm     1945    only    -       Sep     lastSun 2:00    0       S
1916 Rule    Edm     1947    only    -       Apr     lastSun 2:00    1:00    D
1917 Rule    Edm     1947    only    -       Sep     lastSun 2:00    0       S
1918 Rule    Edm     1967    only    -       Apr     lastSun 2:00    1:00    D
1919 Rule    Edm     1967    only    -       Oct     lastSun 2:00    0       S
1920 Rule    Edm     1969    only    -       Apr     lastSun 2:00    1:00    D
1921 Rule    Edm     1969    only    -       Oct     lastSun 2:00    0       S
1922 Rule    Edm     1972    1986    -       Apr     lastSun 2:00    1:00    D
1923 Rule    Edm     1972    2006    -       Oct     lastSun 2:00    0       S
1924 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
1925 Zone America/Edmonton   -7:33:52 -      LMT     1906 Sep
1926                         -7:00   Edm     M%sT    1987
1927                         -7:00   Canada  M%sT
1928 
1929 
1930 # British Columbia
1931 
1932 # From Paul Eggert (2006-03-22):
1933 # Shanks & Pottenger write that since 1970 most of this region has
1934 # been like Vancouver.
1935 # Dawson Creek uses MST.  Much of east BC is like Edmonton.
1936 # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1937 
1938 # It seems though that (re: Creston) is not entirely correct:
1939 
1940 # From Chris Walton (2011-12-01):
1941 # There are two areas within the Canadian province of British Columbia
1942 # that do not currently observe daylight saving:
1943 # a) The Creston Valley (includes the town of Creston and surrounding area)
1944 # b) The eastern half of the Peace River Regional District


1997 # From Tim Parenti (2015-09-23):
1998 # This requires a new zone for the Northern Rockies Regional Municipality,
1999 # America/Fort_Nelson.  The resolution of 2014-12-08 was reached following a
2000 # 2014-11-15 poll with nearly 75% support.  Effectively, the municipality has
2001 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
2002 # 2015-03-08.
2003 #
2004 # From Paul Eggert (2015-09-23):
2005 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
2006 
2007 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2008 Rule    Vanc    1918    only    -       Apr     14      2:00    1:00    D
2009 Rule    Vanc    1918    only    -       Oct     27      2:00    0       S
2010 Rule    Vanc    1942    only    -       Feb      9      2:00    1:00    W # War
2011 Rule    Vanc    1945    only    -       Aug     14      23:00u  1:00    P # Peace
2012 Rule    Vanc    1945    only    -       Sep     30      2:00    0       S
2013 Rule    Vanc    1946    1986    -       Apr     lastSun 2:00    1:00    D
2014 Rule    Vanc    1946    only    -       Oct     13      2:00    0       S
2015 Rule    Vanc    1947    1961    -       Sep     lastSun 2:00    0       S
2016 Rule    Vanc    1962    2006    -       Oct     lastSun 2:00    0       S
2017 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2018 Zone America/Vancouver  -8:12:28 -      LMT     1884
2019                         -8:00   Vanc    P%sT    1987
2020                         -8:00   Canada  P%sT
2021 Zone America/Dawson_Creek -8:00:56 -    LMT     1884
2022                         -8:00   Canada  P%sT    1947
2023                         -8:00   Vanc    P%sT    1972 Aug 30  2:00
2024                         -7:00   -       MST
2025 Zone America/Fort_Nelson        -8:10:47 -      LMT     1884
2026                         -8:00   Vanc    P%sT    1946
2027                         -8:00   -       PST     1947
2028                         -8:00   Vanc    P%sT    1987
2029                         -8:00   Canada  P%sT    2015 Mar  8  2:00
2030                         -7:00   -       MST
2031 Zone America/Creston    -7:46:04 -      LMT     1884
2032                         -7:00   -       MST     1916 Oct 1
2033                         -8:00   -       PST     1918 Jun 2
2034                         -7:00   -       MST
2035 
2036 # Northwest Territories, Nunavut, Yukon
2037 


2068 #
2069 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
2070 #   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2071 #   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
2072 #   Yukon Interpretation Ordinance
2073 #   Yukon standard time is the local mean time at the one hundred and
2074 #   thirty-fifth meridian.
2075 #
2076 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
2077 #   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2078 #   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2079 #   Yukon Interpretation Ordinance, 1955, Chap. 16.
2080 #
2081 #     (1) Subject to this section, standard time shall be reckoned as nine
2082 #     hours behind Greenwich Time and called Yukon Standard Time.
2083 #
2084 #     (2) Notwithstanding subsection (1), the Commissioner may make regulations
2085 #     varying the manner of reckoning standard time.
2086 #
2087 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2088 #   http://? - no online source found
2089 #
2090 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2091 #   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2092 #   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
2093 #   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2094 #
2095 #     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2096 #     Territory on 27th January, 1966, is hereby revoked.
2097 #
2098 #     2. Yukon (East) Standard Time as defined by section 36 of the
2099 #     Interpretation Ordinance from and after mid-night on the 28th day of May,
2100 #     1967 shall be reckoned in the same manner as Pacific Standard Time, that
2101 #     is to say, eight hours behind Greenwich Time in the area of the Yukon
2102 #     Territory lying east of the 138th degree longitude west.
2103 #
2104 #     3. In the remainder of the Territory, lying west of the 138th degree
2105 #     longitude west, Yukon (West) Standard Time shall be reckoned as nine
2106 #     hours behind Greenwich Time.
2107 #
2108 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2109 #   https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2110 #   C.O. 1973/214 INTERPRETATION ACT ...
2111 #
2112 #     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2113 #     revoked.
2114 #
2115 #     2. Yukon Standard Time as defined by section 36 of the Interpretation
2116 #     Act from and after midnight on the twenty-eighth day of October, 1973
2117 #     shall be reckoned in the same manner as Pacific Standard Time, that is
2118 #     to say eight hours behind Greenwich Time.
2119 #
2120 # * O.I.C. 1980/02 INTERPRETATION ACT
2121 #   http://? - no online source found
2122 #
2123 # * Yukon Daylight Saving Time, YOIC 1987/56
2124 #   https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2125 #   O.I.C. 1987/056 INTERPRETATION ACT ...
2126 #
2127 #   In every year between
2128 #     (a) two o'clock in the morning in the first Sunday in April, and
2129 #     (b) two o'clock in the morning in the last Sunday in October,
2130 #   Standard Time shall be reckoned as seven hours behind Greenwich Time and
2131 #   called Yukon Daylight Saving Time.
2132 #   ...
2133 #   Dated ... 9th day of March, A.D., 1987.
2134 #
2135 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
2136 #   https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2137 #   O.I.C. 2006/127 INTERPRETATION ACT ...
2138 #
2139 #     1. In Yukon each year the time for general purposes shall be 7 hours
2140 #     behind Greenwich mean time during the period commencing at two o'clock
2141 #     in the forenoon on the second Sunday of March and ending at two o'clock


2317 # search on the weather through Env. Canada. web site"
2318 #
2319 # If I had realized the Stephanie did not live in Resolute Bay I would
2320 # never have contacted her.  I now believe that all the information I
2321 # obtained in November 2008 should be ignored...
2322 # I apologize for reporting incorrect information in 2008.
2323 
2324 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2325 Rule    NT_YK   1918    only    -       Apr     14      2:00    1:00    D
2326 Rule    NT_YK   1918    only    -       Oct     27      2:00    0       S
2327 Rule    NT_YK   1919    only    -       May     25      2:00    1:00    D
2328 Rule    NT_YK   1919    only    -       Nov      1      0:00    0       S
2329 Rule    NT_YK   1942    only    -       Feb      9      2:00    1:00    W # War
2330 Rule    NT_YK   1945    only    -       Aug     14      23:00u  1:00    P # Peace
2331 Rule    NT_YK   1945    only    -       Sep     30      2:00    0       S
2332 Rule    NT_YK   1965    only    -       Apr     lastSun 0:00    2:00    DD
2333 Rule    NT_YK   1965    only    -       Oct     lastSun 2:00    0       S
2334 Rule    NT_YK   1980    1986    -       Apr     lastSun 2:00    1:00    D
2335 Rule    NT_YK   1980    2006    -       Oct     lastSun 2:00    0       S
2336 Rule    NT_YK   1987    2006    -       Apr     Sun>=1       2:00    1:00    D
2337 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2338 # aka Panniqtuuq
2339 Zone America/Pangnirtung 0      -       -00     1921 # trading post est.
2340                         -4:00   NT_YK   A%sT    1995 Apr Sun>=1  2:00
2341                         -5:00   Canada  E%sT    1999 Oct 31  2:00
2342                         -6:00   Canada  C%sT    2000 Oct 29  2:00
2343                         -5:00   Canada  E%sT
2344 # formerly Frobisher Bay
2345 Zone America/Iqaluit    0       -       -00     1942 Aug # Frobisher Bay est.
2346                         -5:00   NT_YK   E%sT    1999 Oct 31  2:00
2347                         -6:00   Canada  C%sT    2000 Oct 29  2:00
2348                         -5:00   Canada  E%sT
2349 # aka Qausuittuq
2350 Zone America/Resolute   0       -       -00     1947 Aug 31 # Resolute founded
2351                         -6:00   NT_YK   C%sT    2000 Oct 29  2:00
2352                         -5:00   -       EST     2001 Apr  1  3:00
2353                         -6:00   Canada  C%sT    2006 Oct 29  2:00
2354                         -5:00   -       EST     2007 Mar 11  3:00
2355                         -6:00   Canada  C%sT
2356 # aka Kangiqiniq
2357 Zone America/Rankin_Inlet 0     -       -00     1957 # Rankin Inlet founded


2464 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2465 # [translated], says "summer time will ... take effect on the first Sunday
2466 # in May, and end on the last Sunday of September.
2467 
2468 # From Arthur David Olson (2001-01-25):
2469 # The 2001-01-24 traditional Washington Post contained the page one
2470 # story "Timely Issue Divides Mexicans."...
2471 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2472 # ... Mexico City Mayor López Obrador "...is threatening to keep
2473 # Mexico City and its 20 million residents on a different time than
2474 # the rest of the country..." In particular, López Obrador would abolish
2475 # observation of Daylight Saving Time.
2476 
2477 # Official statute published by the Energy Department
2478 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2479 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2480 # and Sonora with no DST.  This was reported by Jesper Nørgaard (2001-02-03).
2481 
2482 # From Paul Eggert (2001-03-03):
2483 #
2484 # http://www.latimes.com/news/nation/20010303/t000018766.html
2485 # James F. Smith writes in today's LA Times
2486 # * Sonora will continue to observe standard time.
2487 # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2488 #   the Federal District will not adopt DST.
2489 # * 4 of 16 district leaders announced they'll ignore the decree.
2490 # * The decree does not affect federal-controlled facilities including
2491 #   the airport, banks, hospitals, and schools.
2492 #
2493 # For now we'll assume that the Federal District will bow to federal rules.
2494 
2495 # From Jesper Nørgaard (2001-04-01):
2496 # I found some references to the Mexican application of daylight
2497 # saving, which modifies what I had already sent you, stating earlier
2498 # that a number of northern Mexican states would go on daylight
2499 # saving. The modification reverts this to only cover Baja California
2500 # (Norte), while all other states (except Sonora, who has no daylight
2501 # saving all year) will follow the original decree of president
2502 # Vicente Fox, starting daylight saving May 6, 2001 and ending
2503 # September 30, 2001.
2504 # References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>


2591 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2592 #    of Quintana Roo.
2593 # 5- The islands, reefs and keys shall take their timezone from the
2594 #    longitude they are located at.
2595 
2596 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2597 Rule    Mexico  1939    only    -       Feb     5       0:00    1:00    D
2598 Rule    Mexico  1939    only    -       Jun     25      0:00    0       S
2599 Rule    Mexico  1940    only    -       Dec     9       0:00    1:00    D
2600 Rule    Mexico  1941    only    -       Apr     1       0:00    0       S
2601 Rule    Mexico  1943    only    -       Dec     16      0:00    1:00    W # War
2602 Rule    Mexico  1944    only    -       May     1       0:00    0       S
2603 Rule    Mexico  1950    only    -       Feb     12      0:00    1:00    D
2604 Rule    Mexico  1950    only    -       Jul     30      0:00    0       S
2605 Rule    Mexico  1996    2000    -       Apr     Sun>=1       2:00    1:00    D
2606 Rule    Mexico  1996    2000    -       Oct     lastSun 2:00    0       S
2607 Rule    Mexico  2001    only    -       May     Sun>=1       2:00    1:00    D
2608 Rule    Mexico  2001    only    -       Sep     lastSun 2:00    0       S
2609 Rule    Mexico  2002    max     -       Apr     Sun>=1       2:00    1:00    D
2610 Rule    Mexico  2002    max     -       Oct     lastSun 2:00    0       S
2611 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2612 # Quintana Roo; represented by Cancún
2613 Zone America/Cancun     -5:47:04 -      LMT     1922 Jan  1  0:12:56
2614                         -6:00   -       CST     1981 Dec 23
2615                         -5:00   Mexico  E%sT    1998 Aug  2  2:00
2616                         -6:00   Mexico  C%sT    2015 Feb  1  2:00
2617                         -5:00   -       EST
2618 # Campeche, Yucatán; represented by Mérida
2619 Zone America/Merida     -5:58:28 -      LMT     1922 Jan  1  0:01:32
2620                         -6:00   -       CST     1981 Dec 23
2621                         -5:00   -       EST     1982 Dec  2
2622                         -6:00   Mexico  C%sT
2623 # Coahuila, Nuevo León, Tamaulipas (near US border)
2624 # This includes the following municipalities:
2625 #   in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava,
2626 #     Guerrero, Hidalgo.
2627 #   in Nuevo León: Anáhuac, Los Aldama.
2628 #   in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2629 #     Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2630 # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal,
2631 # 2016-03-12


2784 # no information
2785 
2786 ###############################################################################
2787 
2788 # Anguilla
2789 # Antigua and Barbuda
2790 # See America/Port_of_Spain.
2791 
2792 # Bahamas
2793 #
2794 # For 1899 Milne gives -5:09:29.5; round that.
2795 #
2796 # From Sue Williams (2006-12-07):
2797 # The Bahamas announced about a month ago that they plan to change their DST
2798 # rules to sync with the U.S. starting in 2007....
2799 # http://www.jonesbahamas.com/?c=45&a=10412
2800 
2801 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2802 Rule    Bahamas 1964    1975    -       Oct     lastSun 2:00    0       S
2803 Rule    Bahamas 1964    1975    -       Apr     lastSun 2:00    1:00    D
2804 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2805 Zone    America/Nassau  -5:09:30 -      LMT     1912 Mar 2
2806                         -5:00   Bahamas E%sT    1976
2807                         -5:00   US      E%sT
2808 
2809 # Barbados
2810 
2811 # For 1899 Milne gives -3:58:29.2; round that.
2812 
2813 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2814 Rule    Barb    1977    only    -       Jun     12      2:00    1:00    D
2815 Rule    Barb    1977    1978    -       Oct     Sun>=1       2:00    0       S
2816 Rule    Barb    1978    1980    -       Apr     Sun>=15      2:00    1:00    D
2817 Rule    Barb    1979    only    -       Sep     30      2:00    0       S
2818 Rule    Barb    1980    only    -       Sep     25      2:00    0       S
2819 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2820 Zone America/Barbados   -3:58:29 -      LMT     1924 # Bridgetown
2821                         -3:58:29 -      BMT     1932 # Bridgetown Mean Time
2822                         -4:00   Barb    A%sT
2823 
2824 # Belize
2825 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2826 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2827 Rule    Belize  1918    1942    -       Oct     Sun>=2       0:00    0:30    -0530
2828 Rule    Belize  1919    1943    -       Feb     Sun>=9       0:00    0       CST
2829 Rule    Belize  1973    only    -       Dec      5      0:00    1:00    CDT
2830 Rule    Belize  1974    only    -       Feb      9      0:00    0       CST
2831 Rule    Belize  1982    only    -       Dec     18      0:00    1:00    CDT
2832 Rule    Belize  1983    only    -       Feb     12      0:00    0       CST
2833 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2834 Zone    America/Belize  -5:52:48 -      LMT     1912 Apr
2835                         -6:00   Belize  %s
2836 
2837 # Bermuda
2838 
2839 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2840 # Bermuda dockyard, Ireland I; round that.
2841 
2842 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2843 
2844 # Next year, however, clocks in the US will go forward on the second Sunday
2845 # in March, until the first Sunday in November.  And, after the Time Zone
2846 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2847 # Friday, the same thing will happen in Bermuda.
2848 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2849 
2850 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2851 Zone Atlantic/Bermuda   -4:19:18 -      LMT     1930 Jan  1  2:00 # Hamilton
2852                         -4:00   -       AST     1974 Apr 28  2:00
2853                         -4:00   Canada  A%sT    1976
2854                         -4:00   US      A%sT
2855 
2856 # Cayman Is
2857 # See America/Panama.
2858 
2859 # Costa Rica
2860 
2861 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2862 
2863 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
2864 Rule    CR      1979    1980    -       Feb     lastSun 0:00    1:00    D
2865 Rule    CR      1979    1980    -       Jun     Sun>=1       0:00    0       S
2866 Rule    CR      1991    1992    -       Jan     Sat>=15      0:00    1:00    D
2867 # IATA SSIM (1991-09) says the following was at 1:00;
2868 # go with Shanks & Pottenger.
2869 Rule    CR      1991    only    -       Jul      1      0:00    0       S
2870 Rule    CR      1992    only    -       Mar     15      0:00    0       S
2871 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2872 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
2873 Zone America/Costa_Rica -5:36:13 -      LMT     1890        # San José
2874                         -5:36:13 -      SJMT    1921 Jan 15 # San José Mean Time
2875                         -6:00   CR      C%sT
2876 # Coco
2877 # no information; probably like America/Costa_Rica
2878 
2879 # Cuba
2880 
2881 # From Paul Eggert (2013-02-21):
2882 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2883 # for the port, and -5:30 for meteorological observations.
2884 # For now, stick with Shanks & Pottenger.
2885 
2886 # From Arthur David Olson (1999-03-29):
2887 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2888 # the Cuban National Team and the Baltimore Orioles was carried live on
2889 # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2890 # During the game, play-by-play announcer Jim Hunter noted that
2891 # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2892 # Time today."  (The "two hour" remark referred to losing one hour of


3058 Rule    Cuba    1981    1985    -       May     Sun>=5       0:00    1:00    D
3059 Rule    Cuba    1986    1989    -       Mar     Sun>=14      0:00    1:00    D
3060 Rule    Cuba    1990    1997    -       Apr     Sun>=1       0:00    1:00    D
3061 Rule    Cuba    1991    1995    -       Oct     Sun>=8       0:00s   0       S
3062 Rule    Cuba    1996    only    -       Oct      6      0:00s   0       S
3063 Rule    Cuba    1997    only    -       Oct     12      0:00s   0       S
3064 Rule    Cuba    1998    1999    -       Mar     lastSun 0:00s   1:00    D
3065 Rule    Cuba    1998    2003    -       Oct     lastSun 0:00s   0       S
3066 Rule    Cuba    2000    2003    -       Apr     Sun>=1       0:00s   1:00    D
3067 Rule    Cuba    2004    only    -       Mar     lastSun 0:00s   1:00    D
3068 Rule    Cuba    2006    2010    -       Oct     lastSun 0:00s   0       S
3069 Rule    Cuba    2007    only    -       Mar     Sun>=8       0:00s   1:00    D
3070 Rule    Cuba    2008    only    -       Mar     Sun>=15      0:00s   1:00    D
3071 Rule    Cuba    2009    2010    -       Mar     Sun>=8       0:00s   1:00    D
3072 Rule    Cuba    2011    only    -       Mar     Sun>=15      0:00s   1:00    D
3073 Rule    Cuba    2011    only    -       Nov     13      0:00s   0       S
3074 Rule    Cuba    2012    only    -       Apr     1       0:00s   1:00    D
3075 Rule    Cuba    2012    max     -       Nov     Sun>=1       0:00s   0       S
3076 Rule    Cuba    2013    max     -       Mar     Sun>=8       0:00s   1:00    D
3077 
3078 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3079 Zone    America/Havana  -5:29:28 -      LMT     1890
3080                         -5:29:36 -      HMT     1925 Jul 19 12:00 # Havana MT
3081                         -5:00   Cuba    C%sT
3082 
3083 # Dominica
3084 # See America/Port_of_Spain.
3085 
3086 # Dominican Republic
3087 
3088 # From Steffen Thorsen (2000-10-30):
3089 # Enrique Morales reported to me that the Dominican Republic has changed the
3090 # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3091 # http://www.listin.com.do/antes/261000/republica/princi.html
3092 
3093 # From Paul Eggert (2000-12-04):
3094 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3095 
3096 # From Rives McDow (2000-12-01):
3097 # Dominican Republic changed its mind and presidential decree on Tuesday,
3098 # November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
3099 # Dominican Republic will be reverting to 8 hours from the International Date
3100 # Line, and will not be using DST in the foreseeable future.  The reason they
3101 # decided to use DST was to be in synch with Puerto Rico, who was also going
3102 # to implement DST.  When Puerto Rico didn't implement DST, the president
3103 # decided to revert.
3104 
3105 
3106 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3107 Rule    DR      1966    only    -       Oct     30      0:00    1:00    EDT
3108 Rule    DR      1967    only    -       Feb     28      0:00    0       EST
3109 Rule    DR      1969    1973    -       Oct     lastSun 0:00    0:30    -0430
3110 Rule    DR      1970    only    -       Feb     21      0:00    0       EST
3111 Rule    DR      1971    only    -       Jan     20      0:00    0       EST
3112 Rule    DR      1972    1974    -       Jan     21      0:00    0       EST
3113 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3114 Zone America/Santo_Domingo -4:39:36 -   LMT     1890
3115                         -4:40   -       SDMT    1933 Apr  1 12:00 # S. Dom. MT
3116                         -5:00   DR      %s      1974 Oct 27
3117                         -4:00   -       AST     2000 Oct 29  2:00
3118                         -5:00   US      E%sT    2000 Dec  3  1:00
3119                         -4:00   -       AST
3120 
3121 # El Salvador
3122 
3123 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3124 Rule    Salv    1987    1988    -       May     Sun>=1       0:00    1:00    D
3125 Rule    Salv    1987    1988    -       Sep     lastSun 0:00    0       S
3126 # There are too many San Salvadors elsewhere, so use America/El_Salvador
3127 # instead of America/San_Salvador.
3128 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3129 Zone America/El_Salvador -5:56:48 -     LMT     1921 # San Salvador
3130                         -6:00   Salv    C%sT
3131 
3132 # Grenada
3133 # Guadeloupe
3134 # St Barthélemy
3135 # St Martin (French part)
3136 # See America/Port_of_Spain.
3137 
3138 # Guatemala
3139 #
3140 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3141 # Diario Co Latino, at
3142 # <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3143 # says in an article dated 2006-04-19 that the Guatemalan government had
3144 # decided on that date to advance official time by 60 minutes, to lessen the
3145 # impact of the elevated cost of oil....  Daylight saving time will last from
3146 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3147 # From Paul Eggert (2006-06-22):
3148 # The Ministry of Energy and Mines, press release CP-15/2006
3149 # (2006-04-19), says DST ends at 24:00.  See
3150 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3151 
3152 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3153 Rule    Guat    1973    only    -       Nov     25      0:00    1:00    D
3154 Rule    Guat    1974    only    -       Feb     24      0:00    0       S
3155 Rule    Guat    1983    only    -       May     21      0:00    1:00    D
3156 Rule    Guat    1983    only    -       Sep     22      0:00    0       S
3157 Rule    Guat    1991    only    -       Mar     23      0:00    1:00    D
3158 Rule    Guat    1991    only    -       Sep      7      0:00    0       S
3159 Rule    Guat    2006    only    -       Apr     30      0:00    1:00    D
3160 Rule    Guat    2006    only    -       Oct      1      0:00    0       S
3161 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3162 Zone America/Guatemala  -6:02:04 -      LMT     1918 Oct 5
3163                         -6:00   Guat    C%sT
3164 
3165 # Haiti
3166 # From Gwillim Law (2005-04-15):
3167 # Risto O. Nykänen wrote me that Haiti is now on DST.
3168 # I searched for confirmation, and I found a press release
3169 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3170 # <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
3171 #
3172 #  "The Prime Minister's Communication Office notifies the public in general
3173 #   and the press in particular that, following a decision of the Interior
3174 #   Ministry and the Territorial Collectivities [I suppose that means the
3175 #   provinces], Haiti will move to Eastern Daylight Time in the night from next
3176 #   Saturday the 2nd to Sunday the 3rd.
3177 #
3178 #  "Consequently, the Prime Minister's Communication Office wishes to inform
3179 #   the population that the country's clocks will be set forward one hour
3180 #   starting at midnight.  This provision will hold until the last Saturday in
3181 #   October 2005.


3227 # From Steffen Thorsen (2017-03-12):
3228 # We have received 4 mails from different people telling that Haiti
3229 # has started DST again today, and this source seems to confirm that,
3230 # I have not been able to find a more authoritative source:
3231 # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3232 
3233 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3234 Rule    Haiti   1983    only    -       May     8       0:00    1:00    D
3235 Rule    Haiti   1984    1987    -       Apr     lastSun 0:00    1:00    D
3236 Rule    Haiti   1983    1987    -       Oct     lastSun 0:00    0       S
3237 # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3238 # Go with IATA.
3239 Rule    Haiti   1988    1997    -       Apr     Sun>=1       1:00s   1:00    D
3240 Rule    Haiti   1988    1997    -       Oct     lastSun 1:00s   0       S
3241 Rule    Haiti   2005    2006    -       Apr     Sun>=1       0:00    1:00    D
3242 Rule    Haiti   2005    2006    -       Oct     lastSun 0:00    0       S
3243 Rule    Haiti   2012    2015    -       Mar     Sun>=8       2:00    1:00    D
3244 Rule    Haiti   2012    2015    -       Nov     Sun>=1       2:00    0       S
3245 Rule    Haiti   2017    max     -       Mar     Sun>=8       2:00    1:00    D
3246 Rule    Haiti   2017    max     -       Nov     Sun>=1       2:00    0       S
3247 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3248 Zone America/Port-au-Prince -4:49:20 -  LMT     1890
3249                         -4:49   -       PPMT    1917 Jan 24 12:00 # P-a-P MT
3250                         -5:00   Haiti   E%sT
3251 
3252 # Honduras
3253 # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3254 
3255 # From Paul Eggert (2006-05-05):
3256 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3257 # saying Honduras will start using DST midnight Saturday, effective 4
3258 # months until September.  La Tribuna reported today
3259 # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3260 # of Honduras, refused to back down on this.
3261 
3262 # From Jesper Nørgaard Welen (2006-08-08):
3263 # It seems that Honduras has returned from DST to standard time this Monday at
3264 # 00:00 hours (prolonging Sunday to 25 hours duration).
3265 # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3266 
3267 # From Paul Eggert (2006-08-08):
3268 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3269 # http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3270 # It mentions executive decree 18-2006.
3271 
3272 # From Steffen Thorsen (2006-08-17):
3273 # Honduras will observe DST from 2007 to 2009, exact dates are not
3274 # published, I have located this authoritative source:
3275 # http://www.presidencia.gob.hn/noticia.aspx?nId=47
3276 
3277 # From Steffen Thorsen (2007-03-30):
3278 # http://www.laprensahn.com/pais_nota.php?id04962=7386
3279 # So it seems that Honduras will not enter DST this year....
3280 
3281 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3282 Rule    Hond    1987    1988    -       May     Sun>=1       0:00    1:00    D
3283 Rule    Hond    1987    1988    -       Sep     lastSun 0:00    0       S
3284 Rule    Hond    2006    only    -       May     Sun>=1       0:00    1:00    D
3285 Rule    Hond    2006    only    -       Aug     Mon>=1       0:00    0       S
3286 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3287 Zone America/Tegucigalpa -5:48:52 -     LMT     1921 Apr
3288                         -6:00   Hond    C%sT
3289 #
3290 # Great Swan I ceded by US to Honduras in 1972
3291 
3292 # Jamaica
3293 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3294 # unspecified official document, and says "This time is used throughout the
3295 # island".  Go with Milne.  Round to the nearest second as required by zic.
3296 #
3297 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3298 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3299 # Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
3300 # Manley's supporters associated this act with Manley's nickname "Joshua"
3301 # (recall that in the Bible the sun stood still at Joshua's request),
3302 # and with the Rod of Correction which Manley said he had received from
3303 # Haile Selassie, Emperor of Ethiopia.  See:
3304 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3305 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3306 #
3307 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3308 Zone    America/Jamaica -5:07:10 -      LMT     1890        # Kingston
3309                         -5:07:10 -      KMT     1912 Feb    # Kingston Mean Time
3310                         -5:00   -       EST     1974
3311                         -5:00   US      E%sT    1984
3312                         -5:00   -       EST
3313 
3314 # Martinique
3315 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3316 Zone America/Martinique -4:04:20 -      LMT     1890        # Fort-de-France
3317                         -4:04:20 -      FFMT    1911 May    # Fort-de-France MT
3318                         -4:00   -       AST     1980 Apr  6
3319                         -4:00   1:00    ADT     1980 Sep 28
3320                         -4:00   -       AST
3321 
3322 # Montserrat
3323 # See America/Port_of_Spain.
3324 
3325 # Nicaragua
3326 #
3327 # This uses Shanks & Pottenger for times before 2005.
3328 #
3329 # From Steffen Thorsen (2005-04-12):
3330 # I've got reports from 8 different people that Nicaragua just started
3331 # DST on Sunday 2005-04-10, in order to save energy because of
3332 # expensive petroleum.  The exact end date for DST is not yet
3333 # announced, only "September" but some sites also say "mid-September".
3334 # Some background information is available on the President's official site:
3335 # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm


3359 # From Jesper Nørgaard Welen (2006-05-05):
3360 # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3361 # (my informal translation)
3362 # By order of the president of the republic, Enrique Bolaños, Nicaragua
3363 # advanced by sixty minutes their official time, yesterday at 2 in the
3364 # morning, and will stay that way until 30th of September.
3365 #
3366 # From Jesper Nørgaard Welen (2006-09-30):
3367 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3368 # My informal translation runs:
3369 # The natural sun time is restored in all the national territory, in that the
3370 # time is returned one hour at 01:00 am of October 1 of 2006.
3371 #
3372 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
3373 Rule    Nic     1979    1980    -       Mar     Sun>=16      0:00    1:00    D
3374 Rule    Nic     1979    1980    -       Jun     Mon>=23      0:00    0       S
3375 Rule    Nic     2005    only    -       Apr     10      0:00    1:00    D
3376 Rule    Nic     2005    only    -       Oct     Sun>=1       0:00    0       S
3377 Rule    Nic     2006    only    -       Apr     30      2:00    1:00    D
3378 Rule    Nic     2006    only    -       Oct     Sun>=1       1:00    0       S
3379 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3380 Zone    America/Managua -5:45:08 -      LMT     1890
3381                         -5:45:12 -      MMT     1934 Jun 23 # Managua Mean Time?
3382                         -6:00   -       CST     1973 May
3383                         -5:00   -       EST     1975 Feb 16
3384                         -6:00   Nic     C%sT    1992 Jan  1  4:00
3385                         -5:00   -       EST     1992 Sep 24
3386                         -6:00   -       CST     1993
3387                         -5:00   -       EST     1997
3388                         -6:00   Nic     C%sT
3389 
3390 # Panama
3391 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3392 Zone    America/Panama  -5:18:08 -      LMT     1890
3393                         -5:19:36 -      CMT     1908 Apr 22 # Colón Mean Time
3394                         -5:00   -       EST
3395 Link America/Panama America/Cayman
3396 
3397 # Puerto Rico
3398 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3399 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3400 Zone America/Puerto_Rico -4:24:25 -     LMT     1899 Mar 28 12:00 # San Juan
3401                         -4:00   -       AST     1942 May  3
3402                         -4:00   US      A%sT    1946
3403                         -4:00   -       AST
3404 
3405 # St Kitts-Nevis
3406 # St Lucia
3407 # See America/Port_of_Spain.
3408 
3409 # St Pierre and Miquelon
3410 # There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3411 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3412 Zone America/Miquelon   -3:44:40 -      LMT     1911 May 15 # St Pierre
3413                         -4:00   -       AST     1980 May
3414                         -3:00   -       -03     1987
3415                         -3:00   Canada  -03/-02
3416 
3417 # St Vincent and the Grenadines
3418 # See America/Port_of_Spain.
3419 
3420 # Turks and Caicos
3421 #
3422 # From Chris Dunn in
3423 # https://bugs.debian.org/415007
3424 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3425 # daylight saving dates for time changes have been adjusted to match
3426 # the recent U.S. change of dates.
3427 #
3428 # From Brian Inglis (2007-04-28):
3429 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3430 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3431 # rows before that there is an out of date entry for Oct:


3437 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round.  See:
3438 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3439 # Model this as a switch from EST/EDT to AST ...
3440 # From Chris Walton (2014-11-04):
3441 # ... the TCI government appears to have delayed the switch to
3442 # "permanent daylight saving time" by one year....
3443 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3444 #
3445 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3446 # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3447 # during the summer months and Standard Time, also known as Local
3448 # Time, during the winter months with effect from April 2018 ...
3449 # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3450 #
3451 # From Paul Eggert (2017-08-26):
3452 # The date of effect of the spring 2018 change appears to be March 11,
3453 # which makes more sense.  See: Hamilton D. Time change back
3454 # by March 2018 for TCI. Magnetic Media. 2017-08-25.
3455 # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3456 #
3457 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]
3458 Zone America/Grand_Turk -4:44:32 -      LMT     1890
3459                         -5:07:10 -      KMT     1912 Feb # Kingston Mean Time
3460                         -5:00   -       EST     1979
3461                         -5:00   US      E%sT    2015 Nov Sun>=1 2:00
3462                         -4:00   -       AST     2018 Mar 11 3:00
3463                         -5:00   US      E%sT
3464 
3465 # British Virgin Is
3466 # Virgin Is
3467 # See America/Port_of_Spain.
3468 
3469 
3470 # Local Variables:
3471 # coding: utf-8
3472 # End:
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