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make/data/tzdata/leapseconds

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@@ -40,16 +40,13 @@
 # and publishes leap second data in a copyrighted file
 # <https://hpiers.obspm.fr/iers/bul/bulc/Leap_Second.dat>.
 # See: Levine J. Coordinated Universal Time and the leap second.
 # URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995
 # <https://ieeexplore.ieee.org/document/7909995>.
-
 # There were no leap seconds before 1972, because the official mechanism
 # accounting for the discrepancy between atomic time and the earth's rotation
-# did not exist.  The first ("1 Jan 1972") data line in leap-seconds.list
-# does not denote a leap second; it denotes the start of the current definition
-# of UTC.
+# did not exist.
 
 # The correction (+ or -) is made at the given time, so lines
 # will typically look like:
 #       Leap    YEAR    MON     DAY     23:59:60        +       R/S
 # or

@@ -84,9 +81,9 @@
 Leap    2015    Jun     30      23:59:60        +       S
 Leap    2016    Dec     31      23:59:60        +       S
 
 # POSIX timestamps for the data in this file:
 #updated 1467936000
-#expires 1577491200
+#expires 1561680000
 
-#       Updated through IERS Bulletin C57
-#       File expires on:  28 December 2019
+#       Updated through IERS Bulletin C56
+#       File expires on:  28 June 2019
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