BEFORE ATTEMPTING TO REGISTER FOR EVENTS, LOGIN TO YOUR ONLINE MEMBER ACCOUNT. 

Turn cell phones sideways in Calendar View!  You must have a current Membership to be able to register for a calendar event item. 

Change Your Calendar View  Click 'Year' button on left then 'Switch to List View' on right to see all events at once.  You may switch between Week, Month, Year buttons when in Calendar View, then can switch to List View.