Wednesday might be Halloween, but New York City FC Monday reminded its supporters going to the knockout-round game with Philadelphia Union that they cannot wear a mask or a costume into Yankee Stadium.

Translated: its business as usual — or wear what you usually wear to games.

This longstanding Yankee Stadium security procedure will be enforced in order to provide the highest level of safety for all fans in attendance.

For a complete list of all prohibited items at Yankee Stadium, visit:

All gates on will open at 5:30 p.m., with kickoff scheduled for 7:08 p.m. As always, fans are encouraged to budget additional time for entry into the stadium when planning their visits.