The United States Semiquincentennial, or America250, will be celebrated on July 4, 2026.
The date marks 250 years since the Second Continental Congress adopted the Declaration of Independence on July 4, 1776. The anniversary is therefore tied to the founding document’s adoption, rather than to the later ratification of the Constitution or the end of the Revolutionary War.
July 4 became the United States’ national Independence Day because Congress approved the Declaration on that date. Although most delegates signed the engrossed parchment later, primarily on August 2, 1776, the official anniversary commemorates adoption on July 4.
America250 is the common public branding for the national semiquincentennial observance. The previous major milestone was the United States Bicentennial in 1976, which marked 200 years since the Declaration’s adoption.