leapseconds revision 309577
1287545Sdelphij# Allowance for leap seconds added to each time zone file. 275267Swollman 3287545Sdelphij# This file is in the public domain. 42742Swollman 5287545Sdelphij# This file is generated automatically from the data in the public-domain 6287545Sdelphij# leap-seconds.list file available from most NIST time servers. 7287545Sdelphij# If the URL <ftp://time.nist.gov/pub/leap-seconds.list> does not work, 8287545Sdelphij# you should be able to pick up leap-seconds.list from a secondary NIST server. 9309577Sglebius# See <http://tf.nist.gov/tf-cgi/servers.cgi> for a list of secondary servers. 10287545Sdelphij# For more about leap-seconds.list, please see 11287545Sdelphij# The NTP Timescale and Leap Seconds 12287545Sdelphij# http://www.eecis.udel.edu/~mills/leap.html 13287545Sdelphij 14287545Sdelphij# The International Earth Rotation and Reference Systems Service 15287545Sdelphij# periodically uses leap seconds to keep UTC to within 0.9 s of UT1 1658787Sru# (which measures the true angular orientation of the earth in space); see 172742Swollman# Terry J Quinn, The BIPM and the accurate measure of time, 18287545Sdelphij# Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>. 192742Swollman# There were no leap seconds before 1972, because the official mechanism 202742Swollman# accounting for the discrepancy between atomic time and the earth's rotation 212742Swollman# did not exist until the early 1970s. 222742Swollman 232742Swollman# The correction (+ or -) is made at the given time, so lines 242742Swollman# will typically look like: 252742Swollman# Leap YEAR MON DAY 23:59:60 + R/S 262742Swollman# or 272742Swollman# Leap YEAR MON DAY 23:59:59 - R/S 282742Swollman 29287545Sdelphij# If the leapsecond is Rolling (R) the given time is local time. 30287545Sdelphij# If the leapsecond is Stationary (S) the given time is UTC. 312742Swollman 322742Swollman# Leap YEAR MONTH DAY HH:MM:SS CORR R/S 332742SwollmanLeap 1972 Jun 30 23:59:60 + S 342742SwollmanLeap 1972 Dec 31 23:59:60 + S 352742SwollmanLeap 1973 Dec 31 23:59:60 + S 362742SwollmanLeap 1974 Dec 31 23:59:60 + S 372742SwollmanLeap 1975 Dec 31 23:59:60 + S 382742SwollmanLeap 1976 Dec 31 23:59:60 + S 392742SwollmanLeap 1977 Dec 31 23:59:60 + S 402742SwollmanLeap 1978 Dec 31 23:59:60 + S 412742SwollmanLeap 1979 Dec 31 23:59:60 + S 422742SwollmanLeap 1981 Jun 30 23:59:60 + S 432742SwollmanLeap 1982 Jun 30 23:59:60 + S 442742SwollmanLeap 1983 Jun 30 23:59:60 + S 452742SwollmanLeap 1985 Jun 30 23:59:60 + S 462742SwollmanLeap 1987 Dec 31 23:59:60 + S 472742SwollmanLeap 1989 Dec 31 23:59:60 + S 482742SwollmanLeap 1990 Dec 31 23:59:60 + S 492742SwollmanLeap 1992 Jun 30 23:59:60 + S 502742SwollmanLeap 1993 Jun 30 23:59:60 + S 512742SwollmanLeap 1994 Jun 30 23:59:60 + S 5239871SphkLeap 1995 Dec 31 23:59:60 + S 5339871SphkLeap 1997 Jun 30 23:59:60 + S 5439898SphkLeap 1998 Dec 31 23:59:60 + S 55147771SphkLeap 2005 Dec 31 23:59:60 + S 56181424SedwinLeap 2008 Dec 31 23:59:60 + S 57233445SedwinLeap 2012 Jun 30 23:59:60 + S 58287545SdelphijLeap 2015 Jun 30 23:59:60 + S 59309577SglebiusLeap 2016 Dec 31 23:59:60 + S 6086222Swollman 61309577Sglebius# Updated through IERS Bulletin C52 62309577Sglebius# File expires on: 28 June 2017 63