Constitution Day (or Citizenship Day) is an American federal observance that recognizes the adoption of the United States Constitution and those who have become U.S. citizens. It is normally observed on September 17, the day in 1787 that delegates to the Constitutional Convention signed the document in Philadelphia.1
There are many educational resources available online that can be investigated to learn more about the creation of the Constitution and its continued relevancy more then 200 hundred years later. For those who are interested we are including a few of these fun (and educational) resources here!
National Constitution Center
[1] https://www.law.cornell.edu/uscode/text/36/106