
I also went ahead and enhanced it a little... I split it into two calendars: One for events in which any member can post, and one for birthdays in which no one can post. This will help events to stand out on the primary calendar, while still having the birthday calendar as we always have. Events in the primary calendar will be listed at the bottom of the board index, just don't abuse it.
Also, unless you're having an event on your birthday, please don't post your birthday as an event. The calendars were split so events and contests can stand out more.
Oh, and to switch calendars... While viewing the calendar, check the drop-down box at the bottom.