Constitution Day or Citizenship Day is a federally recognized holiday in the United States — recognizing the adoption of the U.S. Constitution and those who have become American citizens by birth or naturalization. The holiday is typically observed on Sept. 17 — the day in 1787 that 39 delegates of the Constitutional Convention signed the document in Philadelphia, Pennsylvania, at Independence Hall.
All institutions receiving federal funding, including funding through the U.S. Department of Education, are required to hold an educational program pertaining to the U.S. Constitution each year (or in the preceding or following week if the date falls on a Saturday, Sunday or holiday).