The United States will celebrate the America250 semiquincentennial in 2026.
The anniversary marks 250 years since the Second Continental Congress adopted the Declaration of Independence on July 4, 1776. The term “semiquincentennial” means a 250th anniversary, combining roots associated with half of five hundred.
America250 is the common public name for the nationwide commemoration. It is organized through the United States Semiquincentennial Commission, a congressionally established, nonpartisan body created in 2016. The anniversary is distinct from the 1976 bicentennial, which marked 200 years, and from the future tricentennial in 2076.
The 2026 observance connects the founding-era declaration with civic programs, historical education, public events, and celebrations across the country. Although the anniversary is often described as America’s 250th birthday, its specific historical reference is the adoption of the Declaration of Independence.