After the event
Until the Board closes you can still fix the schedule, speakers and details. The dates stay as they ran.
Dates
Start early, End now, Change the end, Extend and Return to draft are on the event's Details while they still apply.
Next year
Use Duplicate. The copy takes the details, the rooms and the schedule. It does not take session files, and it does not take an Event pass.
What ends
Session files are removed when the Board closes. Analytics stays a count of phones per day, with no names.