To add a new event in the admin follow these steps :
1) Go to Solutions and click on the particular solution you want to add the event to.
2) Go to Events and click the + button to add a new event.
3) In the pop-up, add Event Name, Date, Platform ID(event ID), Alternate date string(if any) and Facebook Copilot (on/off).
4) Leave all the other fields as it is. Click Save to save the event. It will now appear in the list of events.