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Article #386Re: Computer bugs in the year 2000
From: jrb
Date: Mon, 21 Jan 1985 16:36
Date: Mon, 21 Jan 1985 16:36
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Referring to an article on Julian Dates by Gordon King in Dr Dobb's Journal #80 (June 1983) pages 66-70. Most computer systems use some form of modified Julian date internally because it is compact to store and simple arithmetic can be used on them. A Julian date algorithm for a 16 bit computer is valid for ~179.4 years (65,536 days) This is used as an offset from a base year, usually 1900. Such an algorithm would then stop working in 2079. The base year has to be chosen fairly carefully because of leap years. John R Blaker UUCP: ...!fortune!wdl1!jrb ARPA: jrb@FORD-WDL1 and blaker@FORD-WDL2
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site wdl1.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbosgd!ihnp4!zehntel!hplabs!hpda!fortune!wdl1!jrb From: jrb@wdl1.UUCP Newsgroups: net.bugs Subject: Re: Computer bugs in the year 2000 Message-ID: <212@wdl1.UUCP> Date: Mon, 21-Jan-85 11:36:26 EST Article-I.D.: wdl1.212 Posted: Mon Jan 21 11:36:26 1985 Date-Received: Wed, 23-Jan-85 09:13:38 EST Sender: notes@wdl1.UUCP Organization: Ford Aerospace, Western Development Laboratories Lines: 18 Nf-ID: #R:reed:-82000:wdl1:12500001:000:635 Nf-From: wdl1!jrb Jan 21 08:24:00 1985