[tz] 2021e Asia/Dushanbe

Tim Parenti tim at timtimeonline.com
Fri May 13 16:35:20 UTC 2022


On Fri, 13 May 2022 at 12:20, Nick Deguillaume via tz <tz at iana.org> wrote:

> My guess is that '+05/+06' should be '+05'.
> I may well be wrong. Could you let me know either way?
>

zic.8 in the development repository says, of the RULES field, "When an
amount of time is given, only the sum of standard time and this amount
matters."
https://github.com/eggert/tz/blob/65f616d2ed2784c97240266c9510ced135478d7e/zic.8#L528-L537

So a STDOFF of 5:00 and RULES of 1:00 will sum to an offset of UT+06:00.
Since daylight saving is applied by the rule, the portion of FORMAT after
the slash (+06) is used.

I'm not sure where your "must contain a named rule" quote is coming from —
in this case the "rule" is not named, *per se*, but is rather a constant
1:00.  The relevant thing is that the RULES field is not "-".

If you are interested, I have found a few other bits and pieces where the
> data files are in slight variance with the documentation but are not
> show-stoppers.
>

Certainly, if you find discrepancies in recent releases of our own
documentation that could be cleared up or clarified, please send those
along.

--
Tim Parenti
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