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From: Guy Harris <gharris@sonic.net>
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Date: Fri, 8 Mar 2024 17:57:14 -0800
Cc: Paul Eggert <eggert@cs.ucla.edu>, Time zone mailing list <tz@iana.org>,
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To: Rich Felker <dalias@libc.org>
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Subject: [musl] Re: [tz] [musl] Re: Weird PST8PDT and EST5EDT behavior on Alpine
 Linux

On Mar 8, 2024, at 11:02 AM, Rich Felker via tz <tz@iana.org> wrote:

> It's not so much that we ignore it (it's present in tzname[1], and
> would get applied if you use mktime with tm_isdst=3D1), just that, in
> the absence of a transition rule for it, it's never considered active.
> I don't think this is a particularly good behavior (even though it is
> allowed by POSIX) but nothing great has been proposed as an
> alternative.

The executive summary of this thread appears to be:

	Use XXXnnnYYY TZ settings at your own risk, as there's no =
guarantee how they'll behave.  If you want predictable behavior, either =
use POSIX settings or, if tzdb is present, tzdb settings.