March 4, 1789. To read and understand this powerful and enduring document is a worthy goal of every citizen; and Cornell University Law School has made this easier by hosting on their website an annotated version prepared by the Congressional Research Service. In 2004, Congress renamed Citizenship Day to "Constitution Day and Citizenship Day" and in the process created a new holiday and preserved an old one. Test your knowledge of the history and creation of the Constitution by taking this fun quiz. Also, take a look at HowStuffWorks' webpage on 10 Things You Didn't Know About the U.S. Constitution.