What date was the Constitution primarily ratified?

The Constitution of the United States was primarily ratified on September 17, 1787, which is the date when it was signed by the delegates at the Constitutional Convention in Philadelphia. This event marks a pivotal moment in American history, as it was the culmination of a process aimed at creating a stronger federal government to replace the Articles of Confederation, which were deemed ineffective. The ratification process continued after this date, as the Constitution needed to be approved by at least nine states to become effective, which resulted in ongoing discussions and debates throughout the country. While the Constitution was officially enacted on March 4, 1789, with the start of the new government, the signing on September 17 ultimately represents when the document was completed and offered for ratification.