Constitution Day: September 18

Why do we celebrate Constitution Day?

September 18 of every year is Constitution Day, a day to recognize the signing of the United States Constitution in 1787. In 2004, Congress passed a law mandating any school receiving federal funds of any kind provide educational programming on the significance of this event. The American Civil Liberties Union has made Constitution Day programming in schools across the country an educational priority. This year, the ACLU of Colorado will build on the program we launched in 2013, offering web resources, materials and trained volunteers to classrooms in Colorado. Get more information about Constitution Day resources by emailing us at

Teachers & parents: Make every day Constitution Day with free resources!