time for time details

[std-unix at ut-sally.UUCP]

From: utah-cs!hplabs!hpfcla!hpfclj!hpfcdg!rgt (Ron Tolley)
Date: Thu, 11 Dec 86 18:16:53 est

GMT and UTC are not the same.

The  following  is a list of leap  seconds  which  have  been  added  to
Universal Coordinated Time (UTC) in order to keep it relatively close to
solar time.  Note that with  Greewich Mean Time, such  corrections  were
made  by  stretching  or  contracting  the  length  of  seconds.  UTC is
generally available through time standards, GMT not readily available.

	1)	1972 June 30 23:59:60
	2)	1972 June 30 23:59:61
	3)	1973 June 30 23:59:60
	4)	1974 June 30 23:59:60
	5)	1975 June 30 23:59:60
	6)	1976 June 30 23:59:60
	7)	1977 June 30 23:59:60
	8)	1978 June 30 23:59:60
	9)	1979 June 30 23:59:60
	10)	1981 June 30 23:59:60
	11)	1982 June 30 23:59:60
	12)	1983 June 30 23:59:60
	13)	1985 June 30 23:59:60

This is data derived from an AP story from May 1985.  No data since then
is known.  There is also no indication  whether the insertions were made
in local time or in UTC.  Local time is  assumed.  (Wouldn't  Australia,
Newfoundland,  and other half-hour-off places have fun with inserting an
extra second in the middle of a pseudo-random hour.)

This  information  has been pieced  together from scattered  sources.  I
reserve the right to be proven wrong.

Ron Tolley

Volume-Number: Volume 8, Number 67