Pagination ‹‹ Previous September 2024 Next ›› S M T W T F S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 2 3 4 5 Share This: Add to Your Calendar: Add to iCal Add to Google Constitution Day Tue, Sep 17 2024 12:00 am Image Constitution Day and Citizenship 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.