What is the formal historical term for America's 250th anniversary in 2026?
Answer
Semiquincentennial
The formal historical term for America's 250th anniversary in 2026 is semiquincentennial.
The word combines “semi,” meaning half, with “quincentennial,” meaning a 500th anniversary. Together, the term identifies an anniversary halfway to five centuries, or 250 years. America250 is the shorter public-facing name used for the commemoration.
The terminology can be confusing because related anniversary words sound similar. Centennial means 100 years, sesquicentennial means 150 years, bicentennial means 200 years, and tricentennial means 300 years. “Quarter millennium” is another understandable description, but it is not the standard formal term.
The 2026 event commemorates the anniversary of the Declaration of Independence, adopted by the Second Continental Congress in 1776. The United States Semiquincentennial Commission, created by Congress in 2016, was established to help organize the national observance.