U.S. Air Force 78th Birthday Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: September 18, 2025 all-day 2025-09-18T00:00:00-05:00 2025-09-19T00:00:00-05:00 Where: U.S. Air Force 78th Birthday United States Cost: Free August 18 U.S. Air Force 78th Birthday Even though the U.S. military purchased its first aircraft in 1909, the U.S. Air Force did not exist as a separate and independent branch until September 18, 1947.
