[CalendarServer-users] Timezone Philosophical Musing

[Mark Cockfield]

I¹m trying to devise a timezone strategy for a RIA client I am hoping to
keep fairly thin. Upon contemplating the complexity of the Olson tzdata and
the discovery that other calendar clients don¹t reliably handle the issue
well...this is an calendar object written by iCal to the calendar server:

PUT 
/calendars/__uids__/ada9f1a1-1172-5784-8780-d67f9747dc7c/calendar/E4768A09-3
F1B-4778-987B-B62B92662ED2.ics HTTP/1.1
User-Agent: DAVKit/3.0.4 (652); CalendarStore/3.0.5 (841); iCal/3.0.5
(1270); Mac OS X/10.5.5 (9F33)
Authorization: Basic Y2xpZW50OnRyYWlubWU=
Content-Type: text/calendar
If-Match: "a918de3ca423b993d5603b87590da2f0"
Content-Length: 760
Connection: keep-alive
Host: localhost:8008

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Apple Inc.//iCal 3.0//EN
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Detroit
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
DTSTART:19671029T020000
RRULE:FREQ=YEARLY;UNTIL=20061029T060000Z;BYMONTH=10;BYDAY=-1SU
TZNAME:EST
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
DTSTART:19870405T020000
RRULE:FREQ=YEARLY;UNTIL=20060402T070000Z;BYMONTH=4;BYDAY=1SU
TZNAME:EDT
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VTODO
PRIORITY:0
SEQUENCE:4
DTSTART;TZID=America/Detroit:20040101T120000
UID:E4768A09-3F1B-4778-987B-B62B92662ED2
DTSTAMP:20081206T010207Z
SUMMARY:Test w/Due Date
CREATED:20081206T010119Z
X-APPLE-SORT-ORDER:2147483647
DUE;VALUE=DATE:20081210
END:VTODO
END:VCALENDAR

It seems to me the ideal approach would be to rely on the CalendarServer¹s
timezone service. Use it to retrieve the timezone components I Include in
the components I create, and do an expand query to determine the currently
observed offsets for timezones for which I need to adjust.

So my questions are: is anyone else using this service, and to the
CalendarServer developers, is this service something I may rely upon?

Regards,

Mark
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