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From: zed@mdbs.uucp (Bill Smith)
Newsgroups: comp.databases
Subject: Re: Daylight Savings Time
Message-ID: <1990Aug22.202513.13837@mdbs.uucp>
Date: 22 Aug 90 20:25:13 GMT
Organization: mdbs, Inc.
Lines: 26


>The rule for daylight savings time can change frequently and it is
>different in different countries.  There are some files on a Sun
>(plus other machines I assume) that describe some of the rules.

This information is in the directory /usr/lib/zoneinfo.

>In addition, there are areas in the US that do not observe daylight
>savings time.  The greater part of Indiana is one of them.  (The
>northwest and southwest corners of the state do observe daylight
>savings time.)

According to the information in /usr/lib/zoneinfo, Arizona is another
part of the US that does not observe daylight savings time.  Also, some
of the different Indian Nations within the U.S. apparently may follow 
different policies.

Some parts of the world (especially in wartime) observe double daylight
savings time (where the clock is shifted 2 hours).

The rules for the normal parts of the US are that it changes at
2AM on the first Sunday of April and 2AM on the last Sunday of October.
(I think someone else has said this part already.)

Bill Smith
pur-ee!mdbs!zed