constitution day 2026

Constitution Day 2026 is observed on Thursday, September 17, 2026.

This federal observance commemorates the anniversary of the signing of the U.S. Constitution on September 17, 1787. It also serves as Citizenship Day, honoring the rights and responsibilities of all U.S. citizens. While it is a federally recognized observance—requiring schools and federal agencies to provide educational programming—it is not a federal holiday, meaning businesses and government offices remain open.

The date also marks the beginning of Constitution Week, which runs through September 23, 2026.