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Path: utzoo!linus!philabs!prls!amdimage!amdcad!amd!pesnta!pertec!scgvaxd!trwrb!sdcrdcf!darrelj
From: darrelj@sdcrdcf.UUCP (Darrel VanBuer)
Newsgroups: net.micro.mac
Subject: Re: Daylight Savings Time vs. Macintosh
Message-ID: <1981@sdcrdcf.UUCP>
Date: Wed, 15-May-85 17:19:28 EDT
Article-I.D.: sdcrdcf.1981
Posted: Wed May 15 17:19:28 1985
Date-Received: Mon, 20-May-85 04:13:12 EDT
References: <622@utcs.UUCP> <1484@amdahl.UUCP> <911@peora.UUCP> <1254@hammer.UUCP>
Reply-To: darrelj@sdcrdcf.UUCP (Darrel VanBuer)
Organization: System Development Corp. R+D, Santa Monica
Lines: 21

The Xerox Ethernet protocols for "what time is it?" (both PUP and XNS)
contain the following data in the reply:
GMT number of seconds from a standard EPOCH (usually 12 midnight 1 Jan 1900).
Time zone: hours E/W of GMT + extra minutes
Start of DST (the day number in the year which is the earliest of the 7
possible days in a 365 day year on which DST starts; the right one of the
seven days is of course the Sunday).
End of DST (the day number ...)
When DST does not apply, values are ones which never occur, e.g. 0 or 366.
No doubt there is someplace in the world which can't be handled by these
rules, but they've got to be rare.  These values seldom change for a
stationary system (usually only by legislative action).
-- 
Darrel J. Van Buer, PhD
System Development Corp.
2500 Colorado Ave
Santa Monica, CA 90406
(213)820-4111 x5449
...{allegra,burdvax,cbosgd,hplabs,ihnp4,orstcs,sdcsvax,ucla-cs,akgua}
                                                            !sdcrdcf!darrelj
VANBUER@USC-ECL.ARPA