leapseconds revision 342668
1238384Sjkim# Allowance for leap seconds added to each time zone file. 2238384Sjkim 3238384Sjkim# This file is in the public domain. 4238384Sjkim 5238384Sjkim# This file is generated automatically from the data in the public-domain 6238384Sjkim# leap-seconds.list file, which can be copied from 7238384Sjkim# <ftp://ftp.nist.gov/pub/time/leap-seconds.list> 8238384Sjkim# or <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list> 9238384Sjkim# or <ftp://tycho.usno.navy.mil/pub/ntp/leap-seconds.list>. 10238384Sjkim# For more about leap-seconds.list, please see 11238384Sjkim# The NTP Timescale and Leap Seconds 12238384Sjkim# <https://www.eecis.udel.edu/~mills/leap.html>. 13238384Sjkim 14238384Sjkim# The International Earth Rotation and Reference Systems Service 15238384Sjkim# periodically uses leap seconds to keep UTC to within 0.9 s of UT1 16238384Sjkim# (which measures the true angular orientation of the earth in space) 17238384Sjkim# and publishes leap second data in a copyrighted file 18238384Sjkim# <https://hpiers.obspm.fr/iers/bul/bulc/Leap_Second.dat>. 19238384Sjkim# See: Levine J. Coordinated Universal Time and the leap second. 20238384Sjkim# URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995 21238384Sjkim# <https://ieeexplore.ieee.org/document/7909995>. 22238384Sjkim 23238384Sjkim# There were no leap seconds before 1972, because the official mechanism 24238384Sjkim# accounting for the discrepancy between atomic time and the earth's rotation 25238384Sjkim# did not exist. The first ("1 Jan 1972") data line in leap-seconds.list 26238384Sjkim# does not denote a leap second; it denotes the start of the current definition 27238384Sjkim# of UTC. 28238384Sjkim 29238384Sjkim# The correction (+ or -) is made at the given time, so lines 30238384Sjkim# will typically look like: 31238384Sjkim# Leap YEAR MON DAY 23:59:60 + R/S 32238384Sjkim# or 33238384Sjkim# Leap YEAR MON DAY 23:59:59 - R/S 34238384Sjkim 35238384Sjkim# If the leap second is Rolling (R) the given time is local time (unused here). 36238384SjkimLeap 1972 Jun 30 23:59:60 + S 37238384SjkimLeap 1972 Dec 31 23:59:60 + S 38238384SjkimLeap 1973 Dec 31 23:59:60 + S 39238384SjkimLeap 1974 Dec 31 23:59:60 + S 40238384SjkimLeap 1975 Dec 31 23:59:60 + S 41238384SjkimLeap 1976 Dec 31 23:59:60 + S 42238384SjkimLeap 1977 Dec 31 23:59:60 + S 43238384SjkimLeap 1978 Dec 31 23:59:60 + S 44238384SjkimLeap 1979 Dec 31 23:59:60 + S 45238384SjkimLeap 1981 Jun 30 23:59:60 + S 46238384SjkimLeap 1982 Jun 30 23:59:60 + S 47238384SjkimLeap 1983 Jun 30 23:59:60 + S 48238384SjkimLeap 1985 Jun 30 23:59:60 + S 49238384SjkimLeap 1987 Dec 31 23:59:60 + S 50238384SjkimLeap 1989 Dec 31 23:59:60 + S 51238384SjkimLeap 1990 Dec 31 23:59:60 + S 52238384SjkimLeap 1992 Jun 30 23:59:60 + S 53238384SjkimLeap 1993 Jun 30 23:59:60 + S 54238384SjkimLeap 1994 Jun 30 23:59:60 + S 55238384SjkimLeap 1995 Dec 31 23:59:60 + S 56238384SjkimLeap 1997 Jun 30 23:59:60 + S 57238384SjkimLeap 1998 Dec 31 23:59:60 + S 58238384SjkimLeap 2005 Dec 31 23:59:60 + S 59238384SjkimLeap 2008 Dec 31 23:59:60 + S 60238384SjkimLeap 2012 Jun 30 23:59:60 + S 61238384SjkimLeap 2015 Jun 30 23:59:60 + S 62238384SjkimLeap 2016 Dec 31 23:59:60 + S 63238384Sjkim 64238384Sjkim# POSIX timestamps for the data in this file: 65238384Sjkim#updated 1467936000 66238384Sjkim#expires 1561680000 67238384Sjkim 68238384Sjkim# Updated through IERS Bulletin C56 69238384Sjkim# File expires on: 28 June 2019 70238384Sjkim