What term describes the United States' 250th anniversary, celebrated by America250?
Answer
Semiquincentennial
The term describing the United States' 250th anniversary, celebrated by America250, is semiquincentennial.
The word combines Latin-derived number elements: semi means half, quincentennial relates to 500 years, and therefore a semiquincentennial marks half of a 500-year period, or 250 years. It is the formal name used for the national anniversary of the Declaration of Independence.
Several less common alternatives also exist, including sestercentennial, quarter-millennium, and bisesquicentennial. These terms are valid historical or linguistic alternatives, but semiquincentennial is the best-known official label for the 2026 observance.
The word is sometimes confused with bicentennial, which means 200 years, or sesquicentennial, which means 150 years. The 2026 celebration is specifically tied to the 1776 Declaration and its 250-year milestone.