Which 1976 national celebration preceded America’s 250th anniversary by 50 years?

The United States Bicentennial in 1976 preceded America’s 250th anniversary by 50 years.

The Bicentennial marked 200 years since the Declaration of Independence was adopted in 1776. Its central anniversary date was July 4, 1976, exactly half a century before the 2026 Semiquincentennial.

The celebration included parades, exhibitions, historical programs, fireworks, and widespread patriotic decoration. Philadelphia, where the Declaration and Constitution were debated and signed, served as an especially important host city.

“Bicentennial” means a 200th anniversary, while “semiquincentennial” means a 250th anniversary. The earlier celebration established a major modern precedent for commemorating the nation’s founding, though the 2026 America250 program has its own commission and events.