[tz] Irish Standard Time vs Irish Summer Time
eggert at cs.ucla.edu
Fri Dec 8 21:01:09 UTC 2017
On 12/08/2017 12:12 PM, Michael Deckers via tz wrote:
> Allowing negative AT values would
> provide a "convenient notation" to avoid the
> Chatham Rules, as in
> Rule NZ 2008 max - Apr Sun>=1 -10:00u 0 S
Good point. I hadn't thought of that. We should make that change in a
year or two, after the zic.8 documentation change has had time to percolate.
>> zic.8 ought to be patched to make explicit that AT and SAVE have no
>> small range limits.
> Yes, and it may also be necessary to state the meaning
> of such extensions; for instance, the suffixes u, g, z
> currently are allowed for SAVE values but they
> cannot really be used because it is not clear what
> they are supposed to mean in this context.
Sorry, I don't see a problem here. The u suffix means "treat the date
and time as UTC". If the time is -02:00, that means 22:00 the previous
I installed the attached patch to zic.8 to try to document the
longstanding zic interpretation better.
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