Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!decvax!decwrl!amdcad!lll-crg!seismo!ut-sally!std-unix From: std-unix@ut-sally.UUCP Newsgroups: mod.std.unix Subject: time for time details Message-ID: <6575@ut-sally.UUCP> Date: Sat, 13-Dec-86 13:00:47 EST Article-I.D.: ut-sally.6575 Posted: Sat Dec 13 13:00:47 1986 Date-Received: Mon, 15-Dec-86 22:38:28 EST Organization: IEEE P1003 Portable Operating System for Computer Environments Committee Lines: 37 Approved: jsq@sally.utexas.edu 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