[tz] Reason for removal of several TZ
tz at derickrethans.nl
Mon Dec 4 10:15:11 UTC 2017
On Sun, 3 Dec 2017, Thomas M Steenholdt wrote:
> > Which things went belly up? Details might be helpful.
> From what I've seen, PHP (on Ubuntu) had some hiccups and started
> mentioning Sao Paolo in my date/time outputs, because WGT/WGST was
> suddenly missing:
PHP follows tzdata, and there are some quite false assumptions made in
the thread in that bug report.
> A few of my own scripts that convert time between timezones started
> misbehaving as they expect WGT and WGST to be valid abbreviations.
> This is easy to fix, but there could be (and probably is) other places
> where this could cause problems.
In applications, timezone abbreviations should really only be used for
output, and not for recording which timezone a specific event happened
in. Relying on the UTC offsets they are linked too is a flawed approach.
I have never been keen on the removal of these invented timezone
abbreviations, but it *does* highlight that using them for conversions
is very fragile. You should endavour to remove the reliance on these
(The PHP Date/Time maintainer)
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