In order to view any events on the calendar, you need to make sure that you select the tags you want to see. To view a tag, click on the SHOW TAG MENU button at the bottom of the calendar. A list of tags will appear and from the list you can select or clear tag so that the calendar will show the events you want to see.
On any team page or camp page, there is also a box that will show the upcoming events for that group.