Timezone issues

Martin Konold martin.konold at erfrakon.de
Tue Jun 3 16:49:33 CEST 2008

Bernhard Reiter wrote:

Hi Bernhard,

>> I tend to disagree with this statement. IMHO the location Berlin is always
>> GMT+1 independent of DST. In general DST does NOT affect the timezone. The
>> later is only affected by the location.
> Common explanations tend to differ from your view:
I guess that this is due to some language inaccuracies.

> We would need to change the datetime definition then to include timezone
> information and we would need to come up with a good definition for timezone.
> As this forces a massive change on all clients, I believe we should propose 
> something for beyond the 2.0 spec, which is stable as it is (and having the 
> shortcomings that is has).

I don't see the massive change as current clients seem not to really 
care or implement smart/correct timezone and DST handling.

>> Why is a recurring event like weekly on Mondays at 2pm a rare use case?
> Well, it is not. But people argued somehow that this was not happening
> due to calculations when the appointment was made.
So how is a reccuring event which happens daily at noon expressed in our 
xml according to your view?

> I remembered testing this stuff Toltec and Kontact back and forth 
> and it used to work.
Did you also cover events which got created before the DST change and 
then looked at them after the DST change?

-- martin

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