Path: utzoo!attcan!uunet!cs.utexas.edu!rutgers!apple!motcsd!hpda!hpcupt1!hpsal2!morrell
From: morrell@hpsal2.HP.COM (Michael Morrell)
Newsgroups: comp.sources.wanted
Subject: Re: daylight time
Message-ID: <9490004@hpsal2.HP.COM>
Date: 23 Jun 89 19:06:26 GMT
References: <419@uncw.UUCP>
Organization: HP System Architecture Lab, Cupertino
Lines: 33

/ hpsal2:comp.sources.wanted / nelson@uncw.UUCP (Jim Nelson) /  8:10 am  Jun 22, 1989 /
I'm looking for the dates when daylight savings time went
into effect (in the USA mainly) from 1Jan70UTC 'till now.
Anybody remember?  For example, when did the start date
move from last Sun. in whatever to first Sun. in whatever?
I think the quit time has always been last Sun. in Oct.?
----------

Check for a file /usr/lib/tztab on your system (it's on HP-UX, but I don't
know if it's on other systems).  Summarizing from the one here:

1970-1973
   Start: Last Sunday in April
   Stop:  Last Sunday in October

1974:
   Start: January 6
   Stop:  Last Sunday in November

1975:
   Start: Last Sunday in February
   Stop:  Last Sunday in October

1976-1986:
   Start: Last Sunday in April
   Stop:  Last Sunday in October

1987-Present:
   Start: First Sunday in April
   Stop:  Last Sunday in October


    Michael