1# @(#)leapseconds 7.9
2
3# Allowance for leapseconds added to each timezone file.
4
5# The International Earth Rotation Service periodically uses leap seconds
6# to keep UTC to within 0.9 s of TAI (atomic time); see
7# Terry J Quinn, The BIPM and the accurate measure of time,
8# Proc IEEE 79, 7 (July 1991), 894-905.
9# There were no leap seconds before 1972, because the official mechanism
10# accounting for the discrepancy between atomic time and the earth's rotation
11# did not exist until the early 1970s.
12
13# The correction (+ or -) is made at the given time, so lines
14# will typically look like:
15# Leap YEAR MON DAY 23:59:60 + R/S
16# or
17# Leap YEAR MON DAY 23:59:59 - R/S
18
19# If the leapsecond is Rolling (R) the given time is local time
20# If the leapsecond is Stationary (S) the given time is GMT
21
22# Leap YEAR MONTH DAY HH:MM:SS CORR R/S
23Leap 1972 Jun 30 23:59:60 + S
24Leap 1972 Dec 31 23:59:60 + S
25Leap 1973 Dec 31 23:59:60 + S
26Leap 1974 Dec 31 23:59:60 + S
27Leap 1975 Dec 31 23:59:60 + S
28Leap 1976 Dec 31 23:59:60 + S
29Leap 1977 Dec 31 23:59:60 + S
30Leap 1978 Dec 31 23:59:60 + S
31Leap 1979 Dec 31 23:59:60 + S
32Leap 1981 Jun 30 23:59:60 + S
33Leap 1982 Jun 30 23:59:60 + S
34Leap 1983 Jun 30 23:59:60 + S
35Leap 1985 Jun 30 23:59:60 + S
36Leap 1987 Dec 31 23:59:60 + S
37Leap 1989 Dec 31 23:59:60 + S
38Leap 1990 Dec 31 23:59:60 + S
39Leap 1992 Jun 30 23:59:60 + S
40Leap 1993 Jun 30 23:59:60 + S
41Leap 1994 Jun 30 23:59:60 + S
42Leap 1995 Dec 31 23:59:60 + S
43Leap 1997 Jun 30 23:59:60 + S
44Leap 1998 Dec 31 23:59:60 + S