1# Allowance for leap seconds added to each time zone file. 2 3# This file is in the public domain. 4 5# This file is generated automatically from the data in the public-domain 6# leap-seconds.list file, which is copied from: 7# ftp://ftp.nist.gov/pub/time/leap-seconds.list 8# For more about leap-seconds.list, please see 9# The NTP Timescale and Leap Seconds 10# https://www.eecis.udel.edu/~mills/leap.html 11 12# The International Earth Rotation and Reference Systems Service 13# periodically uses leap seconds to keep UTC to within 0.9 s of UT1 14# (which measures the true angular orientation of the earth in space); see 15# Levine J. Coordinated Universal Time and the leap second. 16# URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995 17# http://ieeexplore.ieee.org/document/7909995/ 18# There were no leap seconds before 1972, because the official mechanism 19# accounting for the discrepancy between atomic time and the earth's rotation 20# did not exist until the early 1970s. 21 22# The correction (+ or -) is made at the given time, so lines 23# will typically look like: 24# Leap YEAR MON DAY 23:59:60 + R/S 25# or 26# Leap YEAR MON DAY 23:59:59 - R/S 27 28# If the leapsecond is Rolling (R) the given time is local time. 29# If the leapsecond is Stationary (S) the given time is UTC. 30 31# Leap YEAR MONTH DAY HH:MM:SS CORR R/S 32Leap 1972 Jun 30 23:59:60 + S 33Leap 1972 Dec 31 23:59:60 + S 34Leap 1973 Dec 31 23:59:60 + S 35Leap 1974 Dec 31 23:59:60 + S 36Leap 1975 Dec 31 23:59:60 + S 37Leap 1976 Dec 31 23:59:60 + S 38Leap 1977 Dec 31 23:59:60 + S 39Leap 1978 Dec 31 23:59:60 + S 40Leap 1979 Dec 31 23:59:60 + S 41Leap 1981 Jun 30 23:59:60 + S 42Leap 1982 Jun 30 23:59:60 + S 43Leap 1983 Jun 30 23:59:60 + S 44Leap 1985 Jun 30 23:59:60 + S 45Leap 1987 Dec 31 23:59:60 + S 46Leap 1989 Dec 31 23:59:60 + S 47Leap 1990 Dec 31 23:59:60 + S 48Leap 1992 Jun 30 23:59:60 + S 49Leap 1993 Jun 30 23:59:60 + S 50Leap 1994 Jun 30 23:59:60 + S 51Leap 1995 Dec 31 23:59:60 + S 52Leap 1997 Jun 30 23:59:60 + S 53Leap 1998 Dec 31 23:59:60 + S 54Leap 2005 Dec 31 23:59:60 + S 55Leap 2008 Dec 31 23:59:60 + S 56Leap 2012 Jun 30 23:59:60 + S 57Leap 2015 Jun 30 23:59:60 + S 58Leap 2016 Dec 31 23:59:60 + S 59 60# Updated through IERS Bulletin C54 61# File expires on: 28 June 2018 62