What anniversary will the United States mark in 2076 after America250?

The United States is expected to mark its Tricentennial in 2076 after America250.

A tricentennial commemorates 300 years. Since the Declaration of Independence was adopted in 1776, adding three centuries produces the year 2076. The 2026 semiquincentennial therefore sits exactly fifty years before that future milestone.

The naming pattern is numerical: centennial means 100 years, bicentennial means 200, and tricentennial means 300. The unusual word semiquincentennial is used for the intervening 250-year anniversary.

The 2076 observance is a future anniversary rather than the current America250 program. References to it help explain the timeline, but they do not mean that the tricentennial has already been formally celebrated or that its complete events schedule is known.