September 17, 1997. Constitution Day. It was on this day two hundred and ten years ago when the Constitutional Convention that had gathered in Philadelphia adjourned, the delegates having voted to recommend to their fellow citizens the Constitution they had spent the hot summer in writing. This was seen as a momentous act. Some great deed had been accomplished, the likes of which had not been seen before. By 1789 enough states had ratified the Constitution to allow it to go into effect.