[Design][Decision] Floating timezones

[Philippe Bossut]

Agree with the proposal as amended by Jeffrey, i.e., make clear that 
modifying the preference does not modify existing events in the repository.

Cheers,
- Philippe

Jeffrey Harris wrote:

>Hi Mimi,
>
>  
>
>>+ Add a preference to "turn on" timezone support
>>    
>>
>
>OK, lets try it.
>
>  
>
>>+ Prior to turning on timezone support, all events are stored as
>>"floating". As a result, if you change the timezone on your computer,
>>none of your events will shift.
>>    
>>
>
>+1, that makes sense.
>
>  
>
>>+ Once you've turned on timezone support, all events are stored in
>>"local time" (whatever timezone your computer is set to) and then
>>timezones proceed to work the way they do today.
>>    
>>
>
>Does this imply that flipping the preference means we should go through
>the repository and convert existing floating dates to the local
>timezone?  Or just that timezone UI is enabled and new events are given
>a timezone by default?
>
>-1 to the former, +1 to the latter.  Basically, I'd prefer that turning
>time zones on and off affected UI, not how items are stored in the
>repository.
>
>If we want the behavior of assigning floating times to the current
>timezone, perhaps we could add a button to do that in the (currently
>non-existent, admittedly) preferences?
>
>  
>
>>+ Nice to have: You turn on timezone support, you make a bunch of
>>timezone adjustments. Then you turn off timezone support. We somehow
>>remember your timezone adjustments if you turn on timezone support again.
>>    
>>
>
>Assuming the timezone preference has no impact on items already in the
>repository, this is easy.  If not, hmm.
>
>  
>
>>+ If you have timezone support turned off and receive, import or
>>subscribe to event(s) that have timezone information, the following
>>could happen:
>>++ A dialog pops up telling you that you either have to turn on timezone
>>support or lose timezone info on the data you're adding to your calendar.
>>++ The events display in the calendar in "floating time", but in the
>>detail view, you can see what timezone they're in.
>>    
>>
>
>I like the latter best.
>
>Sincerely,
>Jeffrey
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