The events template is setup to display the calendar and list view of events published site wide.
The "Events Template" Template allows users to filter between events and view either a list of all events or a full calendar of events. By default, this template doesn't support header images.
To add new content to any of these sections, navigate to Content > Events. Create Your Event, and assign it to the category you wish it to display in.
Detailed event help can be found at http://help.monkcms.com/users/events/events/