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Constitution Day

Constitution Day and Citizenship Day commemorate the signing of the United States Constitution on Sept. 17, 1787.

Constitution Day and Citizenship Day will be observed in 2027 on Friday, Sept. 17.

Explore the Constitution

Additional resources

  • National Constitution Center
    Learn about the history, significance, and current relevance of the U.S. Constitution through interactive resources and educational materials.
  • The U.S. Constitution (Full Text)
    Access the complete text of the U.S. Constitution as preserved by the National Archives.
  • Constitution Annotated
    Explore a detailed explanation of the Constitution’s provisions and how they have been interpreted by courts and scholars over time.
  • Bill of Rights Institute
    Discover engaging educational tools, videos, and articles about constitutional rights, civic responsibility and the foundations of American government.