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From: jerryp@tektools.TEK.COM (Jerry Peek)
Newsgroups: comp.unix.wizards
Subject: Re: Daylight Savings Time: how to fix ctime.c
Message-ID: <2284@tektools.TEK.COM>
Date: Wed, 18-Mar-87 17:07:32 EST
Article-I.D.: tektools.2284
Posted: Wed Mar 18 17:07:32 1987
Date-Received: Fri, 20-Mar-87 04:44:46 EST
References: <4992@brl-adm.ARPA>
Reply-To: jerryp@tektools.TEK.COM (Jerry Peek)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 24
Summary: local variations in DST rules

In article <4992@brl-adm.ARPA> Makey@LOGICON.arpa (Jeff Makey) writes:
> Those of you with UNIX source who plan to fix your ctime routine so it
> knows about the 1987+ daylight savings time rules should be interested
> in the following information about daylight time in the United States.
> 
>     before 1967     no daylight time at all
>     1967 -> 1973    last Sunday in April -> last Sunday in October
>     1974            first Sunday in January -> last Sunday in October
>     1975            last Sunday in February -> last Sunday in October
>     1976 -> 1986    last Sunday in April -> last Sunday in October
>     beginning 1987  first Sunday in April -> last Sunday in October

Don't forget about *local* variations in DST rules.  I don't know how many
places are like the town where I grew up (Los Alamos, NM)... but my town went
on Daylight time during the summers, even when the rest of the state didn't.
Once the national DST laws took effect, I think Los Alamos just followed along.

[It was a weird town anyway... must be all that nuclear radiation stuff. :-)]

--Jerry Peek, Tektronix, Inc.
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