The Manhattan Project National Historical Park will commemorate the tennis court dances that occurred in Jackson Square 75 years ago with a dance and costume contest in October.

The Tennis Court Dance and Costume Contest is scheduled from 6 to 9 p.m. Friday, October 11, in the Jackson Square tennis courts. The free event will feature swing dancing music from the 1940s World War II era.

All ages are welcome to attend and everyone is encouraged to participate in the costume contest with their best 1940s costume. One winner will be announced for best individual costume and one for group costumes.

Food trucks will be available.

Public parking is available along Broadway Avenue near Kentucky Avenue and within the public parking in Jackson Square. In the event of bad weather, the dance will be held in the ballroom at DoubleTree by Hilton at 215 South Illinois Avenue in Oak Ridge, the press release said.

For more information or directions, call the Manhattan Project National Historical Park at (865) 482-1942.