Constitution Day on September 17
September 17 is Constitution Day, commemorating the formation and signing of the U.S. Constitution by thirty-nine brave men on September 17, 1787. It recognizes all who, born in the United States or by naturalization, have become citizens. In 2004, under Senator Robert Byrd's urging, Congress changed the designation of this day to "Constitution Day and Citizenship Day." You can learn more about the U.S. Constitution on the U.S. National Archives website.