National days on December 20, 2026

A little reason to celebrate

U.S. Space Force Birthday

History · Commemorative · December 20

The birthday of the U.S. Space Force, the military branch that organizes, trains and equips forces to operate in and through space.

1803: The Louisiana Purchase is completed at a ceremony in New Orleans. Louisiana Purchase
1940: Captain America Comics #1, containing the first appearance of the superhero Captain America, is published. Captain America Comics
1946: It's a Wonderful Life premieres at the Globe Theatre in New York to mixed reviews. It's a Wonderful Life
1951: The EBR-1 in Arco, Idaho becomes the first nuclear power plant to generate electricity. The electricity powered four light bulbs. Experimental Breeder Reactor I
2019: The United States Space Force becomes the first new branch of the United States Armed Forces since 1947. United States Space Force