Curfews Modified on: Tue, 5 Oct, 2021 at 12:21 PM Specify curfews on the airport. Curfew is used to indicate restriction on an airport. Curfew Type:Normal: Is used if it is a general curfew that last for a long time, e.g. Night closure. Special: is a short time restriction, e.g. runway closure. Curfew is a rule driven event. In the leg gantt this warning appears.