I don't find a way to support the following Outlook recurrence examples while using Aspose.iCalendar.
Maybe someone can help?
1. The last Monday of every Month
2. The last Monday of April
BYDAY=MO will give you every Monday
BYDAY=-1MO will give you the last Monday in each MONTHLY interval.
To limit this to April, set proper DTSTART:20050401 and use UNTIL=20050430 instead of COUNT.