Recurring events with timezone

[Hendrik Helwich]

Hi,

i need to convert an iCalendar (from evolution) to the kolab format. It is 
possible to create a recurring event in evolution which has a start and end 
time in a timezone which is different to UTC. I think this is a reasonable 
configuration.
In the kolab format it is only allowed to store time in UTC format [1].
Because of the summer and winter time i think it is not possible to convert 
such an iCalendar to the kolab format (the UTC start and end time would 
change over time).
How can i handle this problem?

Greetings,

Hendrik



[1] http://kolab.org/doc/kolabformat-2.0rc7-html/x123.html#AEN143