I well remember Veteran's Day of 1980.
Stock market was closed, many of the commodity markets as well.
However, cotton was one of the few markets open with limited/shortened trading hours ....If memory serves me correctly the cotton pit was open an hour.
It opened limit bid, traded to limit offer, only to turn back and (lead option) close sharply unchanged. Yep, unchanged. Not a tick higher. Not a tick lower. Sharply unchanged.