The United States will mark its 250th anniversary, known as the semiquincentennial, in 2026.
The anniversary counts 250 years from the Second Continental Congress’s adoption of the Declaration of Independence on July 4, 1776. The term “semiquincentennial” combines Latin-derived elements meaning half of 500, or 250. America250 is another widely used name for the national commemoration.
The milestone is distinct from the United States Bicentennial, which took place in 1976, 200 years after independence. The 2026 observance also falls during the 250th anniversary of the Revolutionary era’s founding events, making it a national historical commemoration rather than simply a birthday celebration.
The anniversary date is July 4, 2026, although related programs and commemorations span multiple years. The official celebrations focus on American history, civic participation, and the continuing story of the United States.