POW/MIA Recognition Day is commemorated on the third Friday of every September, a date that's not associated with any particular war.
In 1979, Congress and the president passed resolutions making it official after the families of the more than 2,500 Vietnam War POW/MIAs pushed for full accountability. You Are Not Forgotten – that's the central phrase behind the POW/MIA remembrance movement which honors America's prisoners of war, those who are still missing in action and their families.
The point of POW/MIA Recognition Day is to ensure that American remembers to stand behind those who serve and to make sure we do everything we can to account for those who have never returned.