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From: g...@perry.berkeley.edu (Greg Anderson)
Newsgroups: comp.protocols.time.ntp
Subject: Daylight/Std Time & Time Zones
Date: 12 Nov 1992 19:49:52 GMT
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Please forgive me if this is a FAQ, but:

Recently, a question has arisen here involving time zones and
Daylight vs. Standard Time.

We would like to be able to convert dates and times (in UTC)
to their equivalent dates and times in various time zones, including
Pacific Daylight and Standard Time, and vice versa.  I am wondering 
if anyone out there knows of a source where one can get the *entire*
definitive history of the rules for determining Daylight vs. Standard
Time.  

I realize that Standard vs. Daylight is largely an American 
abberation, and that local jurisdictions (states?) are responsible
for determining whether or not to actually make the change.

So does anyone know where one would go to get that sort of 
info?   I would like to write a definitive convertor, if possible,
but any info would be greatly appreciated.

Greg Anderson
UC Berkeley Seismographic Stations
Berkeley, CA  94720
USA
g...@perry.berkeley.edu
(510) 642-3977

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From: egg...@twinsun.com (Paul Eggert)
Newsgroups: comp.protocols.time.ntp
Subject: Re: Daylight/Std Time & Time Zones
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Date: 13 Nov 92 19:29:12 GMT
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g...@perry.berkeley.edu (Greg Anderson) writes:

	I am wondering if anyone out there knows of a source where one
	can get the *entire* definitive history of the rules for
	determining Daylight vs. Standard Time.

Please look at Arthur David Olson's time zone package, which you can
FTP from elsie.nci.nih.gov in pub/tz92b.tar.Z.  It's not a definitive
history, but I doubt whether you'll find anything better.