September 18th is US Pow/MIA Recognition Day.

POW/MIA Recognition Day honors the commitments and the sacrifices made by the USprisoners of war and those who are still missing in action.

By custom, it is on the third Friday in September.

National POW/MIA Recognition Day is one of the six days specified by law on which the black POW/MIA flag shall be flown over federal facilities and cemeteries, post offices and military installations.