[tz] Introduce Etc/UTC+x timezones?

Brian Inglis Brian.Inglis at Shaw.ca
Fri Apr 21 18:10:39 UTC 2023

On 2023-04-21 07:32, Benjamin Drung via tz wrote:
> If people are aware of timezones, they often know UTC and their offsets
> (e.g. Europe/Berlin is UTC+2 summer). But they are probably not aware
> that the Etc/GMT offsets are inverted (e.g. you have to select Etc/GMT-2
> for UTC+2). I was not aware of that and other people as well as the bugs
> in Ubuntu and Debian indicate (see https://launchpad.net/bugs/1325949
> and https://bugs.debian.org/540305).
> What do you think about the idea of introducing Etc/UTC+x timezones that
> have the "correct" offset so that people can select fixed offsets more
> easily? So Etc/GMT-2 would be renamed to Etc/UTC+2 and Etc/GMT-2 would
> become a symlink to it (same for all other Etc/GMT+x and Etc/GMT-x
> timezones).

ISO 4031:1978 first defined the representation of local time differentials, 
commonly referred to as time zones, with -W/+E.

It appears POSIX +W/-E derives from SVID issue 1, published 1985 based on SVR2, 
possibly in (commercial) AT&T Unix 5 or earlier, supporting GMT and US time 
zones all positive.

Anyone have access to earlier references to Unix time zones or TZ in sources?

Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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