Option 1: you can click on the calendar link at the top of the page and add your event.
Option 2: you can attach a calendar event to any topic in any forum. create your event topic as you normally would and then click the "Associated Event" tab below to enter the information. you will have full permission to edit or delete your event as necessary. note: topics created this way can only be edited by editing the topic attached to them

enjoy and please post if you have any issues or questions
-e