What is the 250th-anniversary term used for the United States’ 2026 celebration?
Answer
Semiquincentennial
The 250th-anniversary term used for the United States’ 2026 celebration is semiquincentennial.
The word combines “semi,” meaning half, with “quincentennial,” referring to 500 years. Together, the term describes half of a millennium, or 250 years. It is the formal historical term used for the United States’ 250th anniversary, although America250 is more familiar in public-facing branding.
Other anniversary words refer to different intervals. A bicentennial marks 200 years, a sesquicentennial marks 150 years, and a tricentennial marks 300 years. That distinction can make anniversary vocabulary surprisingly easy to mix up.
Several alternative terms have appeared in discussions of the 2026 observance, including sestercentennial and quarter millennium. Semiquincentennial is the best-known official term in the United States because it directly describes the 250-year milestone commemorated on July 4, 2026.