You can easily restore any events you have archived if you need to use them again.
In the left navigation, make sure you are in the Academy Workspace.
Under Training Admin, select Manage Training and then select Events.
Filter between In-class and Virtual events on the left under Event type.
Filter for Archived events using the State filter, and select the event from the list that appears.
Select Unarchive Event on the right.
Selecting Unarchive then opens a confirmation step, with its own heading, message, and confirm button, before the event is restored.