What future anniversary is listed as the next national milestone after America's 2026 semiquincentennial?

The United States Tricentennial is the future anniversary listed after America's 2026 semiquincentennial.

A tricentennial marks 300 years. Since the semiquincentennial commemorates independence in 1776, the next 300th-anniversary milestone is scheduled for 2076, three centuries after the Declaration of Independence.

The sequence of names can be confusing. A centennial is 100 years, a sesquicentennial is 150 years, a bicentennial is 200 years, and a semiquincentennial is 250 years. The 300-year milestone is commonly called a tricentennial.

The United States has already held earlier national anniversary observances, including the Centennial in 1876, the Sesquicentennial in 1926, and the Bicentennial in 1976. These labels describe elapsed time since the founding-era independence milestone, not the age of every American settlement or institution.