[kdepim-users] Problem to understand how utc-time is read and displayed

[Detlev Reymann]

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Hello,

I am using kontact (respectivly kdepimpi on my zaurus) to organize my
appointments for a long time and I am very happy with them.

Actually I am trying to integrate my mobile phone via SyncML and the
services offered at scheduleworld and have a problem with the way, the
time is interpreted by kdepim.

I tracked the problem down to the following example of a calendar file:

- -------------- example ics-file ------------

BEGIN:VCALENDAR
PRODID:-//K Desktop Environment//NONSGML libkcal 3.5//EN
VERSION:2.0

BEGIN:VEVENT
DTSTAMP:20080409T183730Z
ORGANIZER:MAILTO:mail at server.org
X-KOPIEXTID::
X-MOZ-GENERATION:2
CREATED:20080325T090618Z
UID:kopi-309766496-837
SEQUENCE:4
LAST-MODIFIED:20080409T183723Z
SUMMARY:Datenerhebung und Implementierung
LOCATION:HS 32
PRIORITY:3
RRULE:FREQ=WEEKLY;UNTIL=20080519T103000Z;BYDAY=MO
EXDATE;VALUE=DATE:20080428
EXDATE;VALUE=DATE:20080512
DTSTART:20080324T093000Z
DTEND:20080324T110000Z
TRANSP:OPAQUE
END:VEVENT

BEGIN:VEVENT
DTSTAMP:20080409T183730Z
ORGANIZER:MAILTO:mail at server.org
X-KOPIEXTID::
X-MOZ-GENERATION:2
CREATED:20080325T090739Z
UID:kopi-1702022939-331
SEQUENCE:3
LAST-MODIFIED:20080409T183730Z
SUMMARY:BWL UMIB
LOCATION:HS 6
PRIORITY:3
RRULE:FREQ=WEEKLY;UNTIL=20080630T123000Z;BYDAY=MO
EXDATE;VALUE=DATE:20080428
EXDATE;VALUE=DATE:20080512
DTSTART:20080331T113000Z
DTEND:20080331T134500Z
TRANSP:OPAQUE
END:VEVENT

END:VCALENDAR
- -------------- end of example --------------

As far as I understand the explanations I found on the net, korganizer
is saving dates in UTC-Format, translating them upon saving and reading
according to the timezone-settings.

The first entry has the following time:
DTSTART:20080324T093000Z
DTEND:20080324T110000Z

and the second:

DTSTART:20080331T113000Z
DTEND:20080331T134500Z

The Z at the end means UTC-Time, right?

My local timezone is Europe/Berlin which should be two hours difference
to UTC.

In Korganizer (Kontact Version 1.2.4 on Ubuntu 7.10) and in kdepimpi
(2.2.7) the first appointment is dispayed from 10:30 to 12:00 and the
second from 13:00 to 15:45

When I use the same calendar-file e.g. with sunbird or
mozilla-thunderbird lightning, the first appointment is dispayed from
11:30 to 13:00 and the second is the same as in korganizer (13:30 -15_45).

This leads to a lot of problems if i try to sync the appointments.

As far as I think, sunbird is right and lightning are right for the
first appointment and korganizer not.
Is there any information in the ics-file which leads to that result and
I a do not find the relevant information?

In german we would say "ich bin am Ende meines Lateins angelangt",
simply saying I really do not have any idea...

Could somebody give me a helping hand?

Thanks in advance.

Detlev
- --
Detlev Reymann
detlev at reymann.eu
http://www.reymann.eu

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