After creating and saving an event you need to activate this event in order to be able to create questionnaires.
You do this by clicking on Activate button on the Event Dashboard:
You can archive an Event by clicking the Archive button on the Event Dashboard.
All archived events can be found by clicking on (archived) right next to Events dashboard title:
You can Edit and update your event at any time. Event name, start and end date, description of the event all of the settings seen can be customized:
Please note that if you deactivate or archive an Event, you also archive all connected questionnaires.