What alternate term for a 250th anniversary appears in the Semiquincentennial article's notes?

The alternate term for a 250th anniversary in the article’s notes is Bicenquinquagenary.

The word is built from numerical roots: “bi” suggests two, “cent” refers to a hundred, and “quinquagen” refers to fifty. Together, the construction points to two hundred and fifty years. The term is an alternative to semiquincentennial, the more widely used label for a 250th anniversary.

The United States Semiquincentennial marks 250 years since the Declaration of Independence was adopted in 1776, with the principal anniversary falling on July 4, 2026. “Semiquincentennial” can be understood as half of five centuries, while “bicenquinquagenary” expresses the same span through its component number words.

A common mix-up is confusing the term with bicentennial, which means 200 years, or sesquicentennial, which means 150 years. Tercentenary refers to 300 years, and quadricentennial to 400 years. Bicenquinquagenary is accurate but much less familiar in ordinary usage.