December 2024
- December 1 – Civil Air Patrol (USAF Auxiliary) Birthday (1941)
- December 4 – Somalia (U.S. troops Dec. 4, 1992 - Mar. 26, 1994)
- December 7 – National Pearl Harbor Remembrance Day (1941)
- December 10 – AMVETS (American Veterans) Birthday (1944)
- December 13 – National Guard Birthday & Army National Guard Birthday (1636)
- December 14 – Bosnia and Herzegovina war ends (1995)
- December 18 – National Wreaths Across America (2007)
- December 20 – United States Space Force Birthday (2019)
- December 20 – Panama - Operation Just Cause (Dec. 20, 1989 – Jan. 31, 1990)
- December 26 – End of Cold War (1991)
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