On what date in 2026 did the United States mark its 250th anniversary?

The United States marked its 250th anniversary on July 4, 2026.

The date reflects the anniversary of the Second Continental Congress adopting the Declaration of Independence in 1776. Although the document was formally engrossed and signed later, July 4 became the traditional date associated with American independence.

The 250th anniversary is commonly called the United States Semiquincentennial. It follows the bicentennial celebration of 1976 and precedes the nation’s 300th anniversary in 2076. America250 is the public-facing name used by the official commission and many partner programs.

The anniversary was not simply a single-day observance. Federal, state, local, museum, educational, sporting, and cultural events were organized throughout 2026. This distinction matters because “America’s 250th anniversary” can refer both to the historic milestone and to the wider year-long program of celebrations.