1e27ed2014-09-04Henrik Grubbström (Grubba) # Allowance for leap seconds added to each time zone file.
c0dbee2000-08-01Mirar (Pontus Hagland) 
93f75a2013-11-21Henrik Grubbström (Grubba) # This file is in the public domain. # This file is generated automatically from the data in the public-domain
8de8e92017-11-17Henrik Grubbström (Grubba) # leap-seconds.list file, which is copied from: # ftp://ftp.nist.gov/pub/time/leap-seconds.list
93f75a2013-11-21Henrik Grubbström (Grubba) # For more about leap-seconds.list, please see # The NTP Timescale and Leap Seconds
8de8e92017-11-17Henrik Grubbström (Grubba) # https://www.eecis.udel.edu/~mills/leap.html
93f75a2013-11-21Henrik Grubbström (Grubba) 
792c682014-11-13Henrik Grubbström (Grubba) # The International Earth Rotation and Reference Systems Service # periodically uses leap seconds to keep UTC to within 0.9 s of UT1
c0dbee2000-08-01Mirar (Pontus Hagland) # (which measures the true angular orientation of the earth in space); see
8de8e92017-11-17Henrik Grubbström (Grubba) # Levine J. Coordinated Universal Time and the leap second. # URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995 # http://ieeexplore.ieee.org/document/7909995/
c0dbee2000-08-01Mirar (Pontus Hagland) # 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 until the early 1970s. # 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 # Leap YEAR MON DAY 23:59:59 - R/S
93f75a2013-11-21Henrik Grubbström (Grubba) # If the leapsecond is Rolling (R) the given time is local time. # If the leapsecond is Stationary (S) the given time is UTC.
c0dbee2000-08-01Mirar (Pontus Hagland)  # Leap YEAR MONTH DAY HH:MM:SS CORR R/S Leap 1972 Jun 30 23:59:60 + S Leap 1972 Dec 31 23:59:60 + S Leap 1973 Dec 31 23:59:60 + S Leap 1974 Dec 31 23:59:60 + S Leap 1975 Dec 31 23:59:60 + S Leap 1976 Dec 31 23:59:60 + S Leap 1977 Dec 31 23:59:60 + S Leap 1978 Dec 31 23:59:60 + S Leap 1979 Dec 31 23:59:60 + S Leap 1981 Jun 30 23:59:60 + S Leap 1982 Jun 30 23:59:60 + S Leap 1983 Jun 30 23:59:60 + S Leap 1985 Jun 30 23:59:60 + S Leap 1987 Dec 31 23:59:60 + S Leap 1989 Dec 31 23:59:60 + S Leap 1990 Dec 31 23:59:60 + S Leap 1992 Jun 30 23:59:60 + S Leap 1993 Jun 30 23:59:60 + S Leap 1994 Jun 30 23:59:60 + S Leap 1995 Dec 31 23:59:60 + S Leap 1997 Jun 30 23:59:60 + S Leap 1998 Dec 31 23:59:60 + S
84701a2007-02-01Henrik Grubbström (Grubba) Leap 2005 Dec 31 23:59:60 + S
ecc1102009-03-20Henrik Grubbström (Grubba) Leap 2008 Dec 31 23:59:60 + S
03d5bb2012-04-28Henrik Grubbström (Grubba) Leap 2012 Jun 30 23:59:60 + S
57f5642015-02-14Henrik Grubbström (Grubba) Leap 2015 Jun 30 23:59:60 + S
cca77d2016-10-23Henrik Grubbström (Grubba) Leap 2016 Dec 31 23:59:60 + S
57f5642015-02-14Henrik Grubbström (Grubba) 
8de8e92017-11-17Henrik Grubbström (Grubba) # Updated through IERS Bulletin C54 # File expires on: 28 June 2018