America's 250th anniversary commemorates July 4, 1776, the date associated with the adoption of the United States Declaration of Independence.
The Second Continental Congress formally adopted the Declaration on July 4 in Philadelphia. The document announced that the thirteen American colonies regarded themselves as independent states rather than parts of the British Empire.
The date is celebrated annually as Independence Day, although the revolutionary process involved several important dates. Congress voted for independence on July 2, the Declaration was dated July 4, and many delegates signed the engrossed parchment on August 2.
The 2026 America250 observance therefore marks 250 years from the Declaration's adoption, not 250 years from the first fighting of the American Revolutionary War. This distinction explains why July 4 remains the central date of the national anniversary.