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+# @(#)leapseconds	7.7
+
+# Allowance for leapseconds added to each timezone file.
+
+# The International Earth Rotation Service periodically uses leap seconds
+# to keep UTC to within 0.9 s of TAI (atomic time); see
+# Terry J Quinn, The BIPM and the accurate measure of time,
+# Proc IEEE 79, 7 (July 1991), 894-905.
+# 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
+
+# If the leapsecond is Rolling (R) the given time is local time
+# If the leapsecond is Stationary (S) the given time is GMT
+
+# 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