I have come in late on this discussion, where 

Reinhard_Pötz <[EMAIL PROTECTED]>
> <event start="2004-04-20T19:00">Mom's Birthday

suggested a time event for calendaring.  I would
recommend looking at the HR-XML (www.hr-xml.org)
specification for date-times, which are useful for
specifying the time of events more precisely.

http://ns.hr-xml.org/2_2/HR-XML-2_2/CPO/DateTimeDataTypes.pdf

The problem exists when several users are using the
same calendaring system.  Perhaps your time format
implies UTC - in that case, HR-XML would only add a
"Z" to the end.

> <event start="2004-04-20T19:00Z">Mom's Birthday

However, using their syntax, you could just as easily
include not only the absolute time, but an indication
of the time zone difference when the person creating
event created it.

> <event start="2004-04-20T19:00-05:00">Mom's Birthday

Think of that as it may be useful for clearing up
discrepancies later on, which can be traced back to
time zone differences.  "I placed an order at 14:20,
clearly within your business hours.  Why didn't I get
that shipped Monday?  Answer:  Your order entry
indicates that you are in the XXX time zone.  The
distribution center is 6 time zones ahead, and their
work hours are 8-6, in the YYY time zone."

Jeff Conrad

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