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Print at Sep 21, 2025, 9:22:05 PM

Posted by support at Jan 2, 2014, 9:20:06 PM
Re: Recurring all day events in iCal format should end on correct day of month and not include time in RRULE
In supporting iCal, we've tried testing with as many firms as possible, including Apple, Google, Yahoo, Microsoft (Outlook) and others.

The spec for the iCal RRULE is clear:
The UNTIL rule part defines a date-time value which bounds the recurrence rule in an inclusive manner
http://www.ietf.org/rfc/rfc2445.txt
(emphasis mine)

Your example bug actually parses fine in Outlook, for example. In general, the spec encourages as much specificity as possible, and does not want to leave Date parsing open to implementation (which is what happens when you leave out a time). Unfortunately, Google isn't perfect smile They've decided to only support 1 possible format. Again, excerpted from the spec:
"...this date or date-time becomes the last instance of the recurrence" (emphasis mine again)

We will look at the latest version of the products we test with and see if they can "get by" with the more minimal specification. After all, Google is popular and we are feel compelled to work with them, even if they don't have the best implementation.
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Marc Higgins
Support Associate, localendar.com
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