September 18 national days 2026
On September 18th, 4 national days fall on this date.
September 18 is a date on the 2026 national-day calendar. TheDayOf currently lists 4 observances for this date: National Cheeseburger Day, National POW/MIA Recognition Day, U.S. Air Force Birthday, and National Coupon Day. Open any day page for the date, history, and how to celebrate, or browse the rest of September from the month hub.
National Cheeseburger Day
National Cheeseburger Day is an informal U.S. food observance marked on September 18. In 2026 it falls on Friday, September 18. It is not a…
National POW/MIA Recognition Day
National POW/MIA Recognition Day is observed on the third Friday in September. In 2026 that is Friday, September 18. It honors prisoners of…
U.S. Air Force Birthday
The U.S. Air Force Birthday marks September 18, the date associated with the National Security Act of 1947 establishing the Air Force as an…
National Coupon Day
National Coupon Day is an informal U.S. shopping observance marked on September 18. In 2026 it falls on Friday, September 18. It encourages…