leapseconds revision 58787 
1# @(#)leapseconds	7.12
2# $FreeBSD: head/share/zoneinfo/leapseconds 58787 2000-03-29 14:01:46Z ru $
3
4# Allowance for leapseconds added to each timezone file.
5
6# The International Earth Rotation Service periodically uses leap seconds
7# to keep UTC to within 0.9 s of UT1
8# (which measures the true angular orientation of the earth in space); see
9# Terry J Quinn, The BIPM and the accurate measure of time,
10# Proc IEEE 79, 7 (July 1991), 894-905.
11# There were no leap seconds before 1972, because the official mechanism
12# accounting for the discrepancy between atomic time and the earth's rotation
13# did not exist until the early 1970s.
14
15# The correction (+ or -) is made at the given time, so lines
16# will typically look like:
17#	Leap	YEAR	MON	DAY	23:59:60	+	R/S
18# or
19#	Leap	YEAR	MON	DAY	23:59:59	-	R/S
20
21# If the leapsecond is Rolling (R) the given time is local time
22# If the leapsecond is Stationary (S) the given time is UTC
23
24# Leap	YEAR	MONTH	DAY	HH:MM:SS	CORR	R/S
25Leap	1972	Jun	30	23:59:60	+	S
26Leap	1972	Dec	31	23:59:60	+	S
27Leap	1973	Dec	31	23:59:60	+	S
28Leap	1974	Dec	31	23:59:60	+	S
29Leap	1975	Dec	31	23:59:60	+	S
30Leap	1976	Dec	31	23:59:60	+	S
31Leap	1977	Dec	31	23:59:60	+	S
32Leap	1978	Dec	31	23:59:60	+	S
33Leap	1979	Dec	31	23:59:60	+	S
34Leap	1981	Jun	30	23:59:60	+	S
35Leap	1982	Jun	30	23:59:60	+	S
36Leap	1983	Jun	30	23:59:60	+	S
37Leap	1985	Jun	30	23:59:60	+	S
38Leap	1987	Dec	31	23:59:60	+	S
39Leap	1989	Dec	31	23:59:60	+	S
40Leap	1990	Dec	31	23:59:60	+	S
41Leap	1992	Jun	30	23:59:60	+	S
42Leap	1993	Jun	30	23:59:60	+	S
43Leap	1994	Jun	30	23:59:60	+	S
44Leap	1995	Dec	31	23:59:60	+	S
45Leap	1997	Jun	30	23:59:60	+	S
46Leap	1998	Dec	31	23:59:60	+	S
47