[Ietf-calsify] Another recurrence rule question

[Reinhold Kainhofer]

Hi all,

Another issue to be cleared in a possible clearing FAQ about RFC 2445.

In a weekly recurrence rule, when exactly is the weekday (Monday, Tuesday, 
etc.) taken from DTSTART and when not.
In particular, take a recurrence rule:
   RRULE:FREQ=WEEKLY
This event recurs every week on the same weekday as DTSTART.

Now, what about:
  RRULE:FREQ=WEEKLY;BYMONTHDAY=15
Does this event recur on every 15 of each month, regardless of the weekday, or 
on every 15th of each month if it is the same weekday as DTSTART?

In other words, does FREQ=WEEKLY always imply an implicit BYDAY=.. (value 
taken from DTSTART)?

Cheers,
Reinhold
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Reinhold Kainhofer, Vienna University of Technology, Austria
email: reinhold at kainhofer.com, http://reinhold.kainhofer.com/
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