It’d be cool if there were a way to link our calendar and IFWikis so they were in sync. Probably not an easy thing anyone would want to work on.
I understand ours is a little obscure to locate the mechanism and it’s a bit confusing until you’ve done it once to know how it works and what settings you really don’t need.
If you want to put an event on the calendar here, you create a message for it. There’s a calendar widget under the gear and dialog that will help you generate code to put in the body of your message that connects it with the events calendar automatically. Event/Calendar code has to be in the original post of a topic. Topics with events attached will also show a relative time in the message list:
