Alan Shutko wrote:
The cyclic event might be every 13 days instead of every other Thursday or every third Thurday. I am not sure yet on the exact details of my cyclic events.If it's too tricky, you'd need to do programming... in Emacs, you can use lisp expressions for the "date" of an item. Most other calendar programs won't let you do it.
Surprisingly, Mozilla's calendar lets you do all of these examples relatively trivially and isn't considered very mature so I don't think these kinds of cyclic events are really that tricky. :)