Constitution Day

September 17 is designated as Constitution Day and Citizenship Day to commemorate the signing of the U.S. Constitution in Philadelphia on September 17, 1787. Constitution Day is an American federal observance that recognizes the ratification of the United States Constitution and those who have become U.S. citizens.

In honor of Constitution Day, the Caltech Store will be passing out pocket-sized U.S. Constitution booklets from Friday, September 13 thru Friday, September 20.