The Arena Event calendar displays all active Events. In order for an event to display on the calendar, verify the following for each event:
The Public Calendar Details tab has the visibility set to Public and it is Approved.
The Start and End Dates on the Event Tag Registration tab must be in the current timeframe.
Each event needs a Future Occurrence such as the first date of the event. If the event is over multiple days, create an occurrence for each day in order to display the event on the calendar.