I was asked to try and incorporate a calendar into the forum, which, using someone else's mod, I have done...
The way this calendar works is when you post about an event in the events section, above the post creation is a section to create a calendar event. This event then gets added to the calendar, which is viewable using the link at the top of the page. You need to select an event type (currently either local or national, but these can be changed later) and a start and end date (these can be the same date).
Upcoming dates are shown at the bottom of the main forum, in order.
*there's currently a bug that means you can't actually see what you're typing when naming an event - trying to find the problem