Sesquisemiquincentennial is a mouthful, but it marks a once-in-a-lifetime moment.
In 2026, the United States will commemorate the 250th anniversary of the Declaration of Independence. At the same time, Colorado will celebrate the 150th anniversary of its admission to the Union. As the Centennial State, Colorado is uniquely positioned to observe both milestones — a combined sesquisemiquincentennial.
To guide these twin anniversaries, the America 250–Colorado 150 Commission was established to ensure all Coloradans can participate.…