Calendar:Timezones

Timezones

An event can be defined in any timezone, or be 'floating' (meaning there is no timezone defined)

The calendar is displayed in a timezone the users configured (usually the timezone he lives in, but could be anything)

In what timezone should the datepicker be when editing an event? In the stored timezone or in the display timezone?
Should editing show the timezone?
calIDateTime.jsDate is always in the local timezone. Should it be banned?
On the other hand, it is a way to get a date in the local timezone.
In what timezone are events created by default?
UTC events have issues with recurrance and daylist saving time. For example, 14:00 in UTC can be 12:00 or 13:00 in european time. Recurring every week at 14:00 UTC will change the time in european time. So UTC isn't a suitable storage for normal events.
How to find out the timezone the user lives in? (in tzid format if possible)
How to create an event in a different timezone than you are in? for example, if you have a conference call at 11:00PST, but you live in CET.

for editing:

for getting the default timezone + the ui:

instead of the olsen list of timezones, just store the zones using their name, not their city (CET, PST etc)
the name can be retrieved from the OS
have a list of cities per timezone to present to the user
It should be possible to get this data from the olsen data with some smart scripting

for comparison:

look at other programs that have timezone support. For example, iCal has fantastic support for Timezones (very straightforward).