Which 1976 anniversary served as the previous major U.S. national milestone before America250?

The United States Bicentennial was the previous major U.S. national milestone before America250.

The Bicentennial marked 200 years since the Declaration of Independence in 1776 and was celebrated nationally in 1976. Planning began years earlier, and the observance included exhibitions, ceremonies, educational projects, and community events across the country.

The 1976 celebration is a direct predecessor to the 2026 semiquincentennial. Both anniversaries use the Declaration’s 1776 adoption as their starting point, so the arithmetic is straightforward: 1776 plus 200 produced 1976, while 1776 plus 250 produces 2026.

The Bicentennial is sometimes confused with the centennial celebrations of individual events or institutions. It referred specifically to the 200th anniversary of American independence. America250 similarly refers to the national anniversary, although its programs cover many themes and communities connected with the country’s history.