Not an official holiday, but a day in the US to celebrate the signing by the founding fathers of the Constitution document on September 17, 1787.
http://www.constitutioncenter.org/ncc_p ... n_Day.aspx
Interesting site above with many facts about The Constitution and the men who signed it, along with some fun games, etc., including, "Which Founding Father Are You"
http://www.constitutioncenter.org/FoundersQuiz/
Ha, I took the Founding Father quiz and it says I am most like .... James Madison from Virginia. It says he was diligent, scholarly, and shy. Well, some of that sounds right, especially the shy part, lol. I'll have to do some investigating and find out more about him.
If you take the quiz, let us know which founding father you are most like.