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Date: Sat, 2 May 2020 08:08:33 -0700 (PDT)
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Subject: Re: Getting the 3 letter time zone abbreviation
From: Bob Goddard <1963bib@googlemail.com>
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Xref: reader01.eternal-september.org comp.lang.ada:58552
Date: 2020-05-02T08:08:33-07:00
List-Id: <comp.lang.ada>

And apparently this will not work on non BSD/Linux system, as we need access to the external var tzname, which, if going by the similarly external errno, would require a small C program.

Unless someone knows how to get access to arbitrary external vars.

Still, there is no reason why this could not be implemented in GNAT.