Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uwm.edu!lll-winken!sun-barr!olivea!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: The switch to daylight savings time
Keywords: CMOS, date, DST, setclock, time, TZ, Xenix 3.0
Message-ID: <7288@auspex.auspex.com>
Date: 21 Apr 91 00:11:20 GMT
References: <PINKAS.91Apr9141415@st860.intel.com> <1991Apr10.114836.10816@convex.com> <15842@smoke.brl.mil>
Organization: Auspex Systems, Santa Clara
Lines: 12

>Arthur David Olson a couple of years ago posted an implementation of
>the standard time conversion functions that was driven by external
>table files, which allow for easy incorporation of new time zone rules.
>For unknown reasons, AT&T appear to have settles on a kludgier approach
>for their implementations.

S5R4 includes the Olson implementation (as well as the kludgier stuff,
for backwads-compatibility and, alas, POSIX compatibility); I don't know
how heavily they advertise that fact, or support it in any whizzo system
administration front-end (e.g., they may tell you to set TZ up as
"EST5EDT" or some horrible POSIX-style "include the rules in the string"
setting, rather than as "US/Eastern").