What earlier national anniversary celebration is the 2026 United States Semiquincentennial, or America250, modeled after?

The 2026 United States Semiquincentennial, or America250, is modeled after the United States Bicentennial. The Bicentennial commemorated the 200th anniversary of the Declaration of Independence in 1976.

The celebration developed over many years rather than being a single event. Congress created the American Revolution Bicentennial Commission in 1966, and the American Revolution Bicentennial Administration later coordinated national observances. Activities included exhibitions, parades, concerts, historical programs, and specially designed circulating coins.

The Bicentennial reached its climax on July 4, 1976, when President Gerald Ford attended celebrations in Philadelphia and elsewhere. The event helped establish a modern tradition of marking major American anniversaries through nationwide public history programs.

A common mix-up is calling 1976 the 200th anniversary of the Constitution. The Constitution was drafted in 1787 and ratified in 1788; the 1976 celebration specifically marked the Declaration of Independence and the founding-era independence movement.