On what date did the United States commemorate its semiquincentennial in 2026?

The United States commemorated its semiquincentennial on July 4, 2026.

The date was chosen because July 4, 1776, is the date traditionally associated with the adoption and public proclamation of the Declaration of Independence. The document announced the thirteen American colonies’ separation from Great Britain and became the foundation of the nation’s Independence Day observance.

Congress had voted for independence through the Lee Resolution on July 2, 1776. The Declaration itself was formally adopted two days later, on July 4, making that date the anniversary celebrated every year in the United States.

The anniversary date can cause confusion because several important Revolutionary-era events happened in the same week. The Lee Resolution passed on July 2, the Declaration was adopted on July 4, and the document was signed by many delegates on August 2. America250 centered its national commemoration on July 4, 2026, 250 years after the Declaration’s adoption.