You will only be able to set an opening time for an event in the future. If you set the time in the past, the event will begin from the current time.
(Staff can always enter an event regardless of whether it has begun.)
The maximum time frame for an event is 4 hours. After 4 hours, the event will close and participants will not be able to enter the world.
We recommend that hosts set the opening times for the event half an hour to an hour earlier than the actual time of the event.