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- Newsgroups: comp.lang.c
- Path: cwi.nl!dik
- From: dik@cwi.nl (Dik T. Winter)
- Subject: Re: Leap Years
- Message-ID: <DMw5ty.C65@cwi.nl>
- Sender: news@cwi.nl (The Daily Dross)
- Nntp-Posting-Host: chrysant.cwi.nl
- Organization: CWI, Amsterdam
- References: <3121EF9A.CA5@mail.isd.net> <4g28ut$p87@taurus.fccc.edu> <fcusack-1602961256070001@mudskipper.cac.psu.edu>
- Date: Fri, 16 Feb 1996 23:13:10 GMT
-
- In article <fcusack-1602961256070001@mudskipper.cac.psu.edu> fcusack@tdx.org (frank.) writes:
- > Three out of four centuries are
- > excluded so that the calendar remains in sync with our orbit around the
- > sun (so seasons are "predictable"). It's not perfect however. Every so
- > often, we have to add a leap second, which occurs on 1/1 at midnight. Does
- > anyone know what the rule is for leap seconds?
-
- There is no connection between leap years and leap seconds and there is no
- rule for leap seconds. Leap seconds are inserted because 24*60*60 seconds
- is not exactly equal to a day. But there is no fixed rule because the
- length of a day varies slightly. As soon as the day and the clock
- are out of sync more than a fixed part of a second a leap second is added
- at the end of the year or halfway the year, or a second is omitted from
- one of those two places.
- --
- dik t. winter, cwi, kruislaan 413, 1098 sj amsterdam, nederland, +31205924098
- home: bovenover 215, 1025 jn amsterdam, nederland; http://www.cwi.nl/~dik/
-