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Re: ACTION-129: Expressing timezones in the Calendar API

From: Philip Gladstone <pgladstone@cisco.com>
Date: Wed, 24 Mar 2010 17:37:01 -0400
Message-ID: <4BAA85FD.1040206@cisco.com>
CC: public-device-apis@w3.org


On 24-Mar-10 11:00, Dominique Hazael-Massieux wrote:
>
> Thanks for looking into this! 2 comments:
> - I think we should choose either the Olson identifier, or the URI one,
> but not mix them both up in a single field; I would personally suggest
> using the Olson identifier for v1
> - I'm slightly uncomfortable with binding the whole event to a timezone
> rather than to the specific dates that are defined in it (start, end,
> reminders, and recurrence limits); use cases that require binding to the
> dates rather than events are somewhat convoluted, but it seems like bad
> design to separate a datetime from its timezone in general. Also, since
> we mentioned other cases where we would need a "timezoned" datetime
> (e.g. reception times for messages), I still think we should work on
> TimezoneDate object rather than adding this on the side for events
>
> Dom
>
>   
There are certainly calendar events that make sense with differing
starting and ending timezones. For example, United 177 leaves Boston at
11:15 America/New_York and arrives in San Francisco at 15:00
America/Los_Angeles -- and this is how the flight will appear in your
reservation. This is the 'obvious' form of the calendar event that
corresponds to my flight.

Thus I support having a timezoned datetime object rather than trying to
split out the timezone into a separate field.

Philip

-- 
Philip Gladstone
Distinguished Engineer
Product Development
pgladstone@cisco.com
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Received on Wednesday, 24 March 2010 21:37:36 GMT

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