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Re: [O] Timezone/Encoding issues when exporting as ics and importing to
From: |
Tassilo Horn |
Subject: |
Re: [O] Timezone/Encoding issues when exporting as ics and importing to Google Calendar |
Date: |
Tue, 07 Jun 2011 16:58:50 +0200 |
User-agent: |
Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.50 (gnu/linux) |
Nick Dokos <address@hidden> writes:
Hi Nick,
>> 2. Timezone: I live in Germany and thus all my timestamps are CEST. The
>> exported ics file properly declare X-WR-TIMEZONE:CEST. However,
>> since we also have DST, in summer all appointments show up 2 hours
>> late, and in winter my appointments show up 1 hour late. Is there
>> anything I can do about it? The google calendar settings have CEST
>> as timezone...
>>
>
> I don't know if this is the problem you are running into, but
> icalendar--convert-tz-offset is buggy as-is: it looks as if additional
> work was planned for it, but it never got done. In particular, it
> assumes there is an RRULE in the icalendar file and does not translate
> timezones otherwise.
I don't know the iCalendar spec so I don't know what an RRULE is. But
as far as I can see, `icalendar--convert-tz-offset' is used while
converting an ics file to the diary format.
> Reading your mail again, I guess you are having problems in the
> other direction,
Right. ;-)
> but IME, if there is a bug somewhere, there is at least one more going
> the other way :-)
Probably. Looking at the ical spec, this X-WR-TIMEZONE property is an
optional extension nobody has to obey. Org exports the times like
DTSTART:20110317T091500
which means "local time". So probably the google server has UTC as
local time, my preferences say I want to use Berlin-time, so all events
get two hours added in summer.
Now I've tried to explicitly set the timezone information using
org-icalendar-timezone "Europe/Berlin"
org-icalendar-date-time-format ";TZID=%Z:%Y%m%dT%H%M%S"
and now the events are like
DTSTART;TZID=EUROPE/BERLIN:20110322T140000
DTEND;TZID=EUROPE/BERLIN:20110322T160000
However, that doesn't change anything in google calendar...
Finally, I've set GMT+0 as my current timezone in google calendar, and
now my appointments are shown correctly. Ok, that's not really a
solution but only a workaround...
Oh, there's another possibility; setting
org-icalendar-date-time-format ":%Y%m%dT%H%M%SZ"
which then seems to correctly recalculate the local times in my org
files to GMT. So for an entry that starts at 14:30 and ends an 16:30,
that's what exported.
DTSTART:20100518T123000Z
DTEND:20100518T143000Z
Looks good, I'd say. But when importing that to google calendar, it
shows that entry starting at 16:30 and ending at 18:30 Berlin-time. Now
what's that?!?
Oh, it seems to be some caching issue. Although the new ics file is on
the server now, it seems that a reload of google calendar doesn't
reimport all imported calendars. So I'll wait a bit and report back
what methods work (explicit TZIDs and/or export as UTC).
Bye,
Tassilo