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From: madler@piglet.caltech.edu (Mark Adler)
Newsgroups: comp.sys.next
Subject: Re: Daylight savings time
Message-ID: <1990Nov1.132629.3207@nntp-server.caltech.edu>
Date: 1 Nov 90 13:26:29 GMT
References: <1990Oct29.192654.28687@nntp-server.caltech.edu> <1990Oct30.070713.14635@nntp-server.caltech.edu> <1990Oct31.154611.21160@watdragon.waterloo.edu>
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vik (a NeXT neophyte) points out:
>> And New Zealanders change twice a year, and they have their own special
>> Kiwi Time!

They even have their own special localtime file: /etc/zoneinfo/NZ
Kiwi's have had DST since 1974 and change the Saturday before the last
Sunday in October from 6 pm to 7 pm (to DST) and change the Saturday
before the first Sunday in March from 7 pm to 6 pm (from DST).  (I bet
you were all dying to know that.)  Note that these down-under types
have the seasons shifted by pi, so they just changed to DST.

>> Just as a curiosity, how does one set the particular system, depending
>> on what time zone you work in?

In Preferences click on the clock and then slide the map bar to see the
land-of-many-sheep and click on it.  Then pick "NZDT,NZST" on the button
list above the map.

>> What happens if you don't have a file that corresponds to your time-zone
>> (the kiwi example leaped to mind)?

I guess you'd have to make your own localtime file and put it in
/etc/zoneinfo.  The file format is documented in the man page tzfile(5).
However, it looks like a rather thorough job was done on having all the
time zones in /etc/zoneinfo.

Mark Adler (a NeXT phyte)
madler@piglet.caltech.edu