Which 1976 national anniversary did America250 follow in the United States?

America250 follows the United States Bicentennial, the national 200th anniversary celebrated in 1976.

The bicentennial marked two centuries since the Declaration of Independence. Celebrations included parades, exhibitions, concerts, historical programs, and special commemorative objects across the country. July 4, 1976, was the central date.

Philadelphia hosted major events because of its connection to the Declaration, while Washington, D.C., and many other cities held their own programs. The festivities also included the tall ships of Operation Sail, which gathered in New York Harbor.

The sequence of anniversary terms is straightforward: centennial means 100 years, sesquicentennial means 150, bicentennial means 200, and semiquincentennial means 250. America250 is therefore the next quarter-century milestone after the bicentennial.