The calendar is accessable for users at this link: http://teamup.com/ks7e62e3dbb5f0518a/
You can put up your activity, and edit the specifics within 20 minutes in the same browser-session.
Just click on the day and start writing!!
The purpose of the calendar is to avoid overlapping activities in the same region. You can check this calendar to see when there are other activities, to make sure your activity does not suffer concurrency from other activities.
If you need to delete or edit your activity later, please contact firstname.lastname@example.org
This is a try-out version, we can change the user-settings when necessary.