leapseconds revision 1.1.1.6
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 available from most NIST time servers. 7 # If the URL <ftp://time.nist.gov/pub/leap-seconds.list> does not work, 8 # you should be able to pick up leap-seconds.list from a secondary NIST server. 9 # See <http://tf.nist.gov/tf-cgi/servers.cgi> for a list of secondary servers. 10 # For more about leap-seconds.list, please see 11 # The NTP Timescale and Leap Seconds 12 # http://www.eecis.udel.edu/~mills/leap.html 13 14 # The International Earth Rotation and Reference Systems Service 15 # periodically uses leap seconds to keep UTC to within 0.9 s of UT1 16 # (which measures the true angular orientation of the earth in space); see 17 # Terry J Quinn, The BIPM and the accurate measure of time, 18 # Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>. 19 # There were no leap seconds before 1972, because the official mechanism 20 # accounting for the discrepancy between atomic time and the earth's rotation 21 # did not exist until the early 1970s. 22 23 # The correction (+ or -) is made at the given time, so lines 24 # will typically look like: 25 # Leap YEAR MON DAY 23:59:60 + R/S 26 # or 27 # Leap YEAR MON DAY 23:59:59 - R/S 28 29 # If the leapsecond is Rolling (R) the given time is local time. 30 # If the leapsecond is Stationary (S) the given time is UTC. 31 32 # Leap YEAR MONTH DAY HH:MM:SS CORR R/S 33 Leap 1972 Jun 30 23:59:60 + S 34 Leap 1972 Dec 31 23:59:60 + S 35 Leap 1973 Dec 31 23:59:60 + S 36 Leap 1974 Dec 31 23:59:60 + S 37 Leap 1975 Dec 31 23:59:60 + S 38 Leap 1976 Dec 31 23:59:60 + S 39 Leap 1977 Dec 31 23:59:60 + S 40 Leap 1978 Dec 31 23:59:60 + S 41 Leap 1979 Dec 31 23:59:60 + S 42 Leap 1981 Jun 30 23:59:60 + S 43 Leap 1982 Jun 30 23:59:60 + S 44 Leap 1983 Jun 30 23:59:60 + S 45 Leap 1985 Jun 30 23:59:60 + S 46 Leap 1987 Dec 31 23:59:60 + S 47 Leap 1989 Dec 31 23:59:60 + S 48 Leap 1990 Dec 31 23:59:60 + S 49 Leap 1992 Jun 30 23:59:60 + S 50 Leap 1993 Jun 30 23:59:60 + S 51 Leap 1994 Jun 30 23:59:60 + S 52 Leap 1995 Dec 31 23:59:60 + S 53 Leap 1997 Jun 30 23:59:60 + S 54 Leap 1998 Dec 31 23:59:60 + S 55 Leap 2005 Dec 31 23:59:60 + S 56 Leap 2008 Dec 31 23:59:60 + S 57 Leap 2012 Jun 30 23:59:60 + S 58 Leap 2015 Jun 30 23:59:60 + S 59 60 # Updated through IERS Bulletin C51 61 # File expires on: 28 December 2016 62
Indexes created Tue Aug 18 00:25:06 UTC 2026