[tz] Irish Standard Time vs Irish Summer Time

Clive D.W. Feather clive at davros.org
Tue Dec 12 13:07:58 UTC 2017

Michael H Deckers via tz said:
> > +    This change does not affect UT
> > +    offsets or abbreviations; it affects only whether timestamps are
> > +    considered to be standard time or daylight-saving time, as
> > +    expressed in the tm_isdst flag of C's struct tm type.
> > +    (Discrepancy noted by Derick Rethans.)
>       This is wrong: the dst bit determines whether timestamps are
>       considered to be daylight-saving time or not. The definition
>       of the tm_isdst flag does not even mention standard time, and
>       standard time is not an antonym to daylight-saving time.


Of course, since the EU doesn't have "Daylight Saving Time", the flag
should be zero throughout the year in the EU.

Clive D.W. Feather          | If you lie to the compiler,
Email: clive at davros.org     | it will get its revenge.
Web: http://www.davros.org  |   - Henry Spencer
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