What is the 250-year anniversary term used for America’s 2026 observance?
Answer
Semiquincentennial
The 250-year anniversary term used for America’s 2026 observance is semiquincentennial.
The word combines elements meaning half and five hundred, producing the sense of half of five hundred years, or 250 years. The United States Semiquincentennial marks the 250th anniversary of the Declaration of Independence, adopted on July 4, 1776.
America250 is the public branding used by the federal commission and its partners, while semiquincentennial is the formal anniversary term. Other names have appeared in historical and public usage, including sestercentennial, quarter millennium, and bisesquicentennial.
The terminology can be confusing because anniversary names use different linguistic roots. Bicentennial means 200 years, sesquicentennial means 150 years, and tricentennial means 300 years. Semiquincentennial is the term specifically associated with the 250th anniversary in 2026.