bryntum
Recurrence rules or iterators not creating correct recurrence pattern.
See also https://github.com/bryntum/support/issues/7719
And https://github.com/bryntum/support/issues/8131 could be related.
Non-working rule example 1:
Every first Saturday in January/February/March (shows every first Saturday in every month)
FREQ=MONTHLY;BYDAY=1SA;BYMONTH=1,2,3
The reason is Monthly iterator doesn't support BYMONTH at the moment. Generally speaking our iterators don't support this part of the RFC:
BYxxx rule parts for a period of time that is the same or greater than the frequency generally reduce or limit the number of occurrences of the recurrence generated
More from the forum post: About the last day of the month: I found this weird rrule for the last day on the month somewhere on the internet. After some more searching I just found another rrule that does work in your calendar: "FREQ=MONTHLY;BYMONTHDAY=-1" (but also here adding ";BYMONTH=1,2,3" doesn't work)
We also want to support the 30th day of the month with only February as exception. In the same stackoverflow page where I found that new rrule there is an answer with my original rrule. For the 30th with fallback they give "FREQ=MONTHLY;BYMONTHDAY=28,29,30;BYSETPOS=-1". In your calendar this shows every month on 28th, 29th and 30th. Do you have any idea on how to get my wanted behaviour in your calendar?
