Timeline of drafting and ratification of the United States Constitution Timeline of drafting and ratification of the United States Constitution The drafting of the Constitution of the United States began on May 25, 1787, when the Constitutional Convention met for the first time with a quorum at the Pennsylvania State House (now Independence Hall) in Philadelphia, Pennsylvania to revise the Articles of Confederation, and ended on September 17, 1787, the day the Constitution drafted by the convention's delegates to replace the Articles was adopted and signed. The ratification process for the Constitution began that day, and ended when the final state, Rhode Island, ratified it on May 29, 1790. In
Secession in the United States they achieved ratification—and de jure status—in early 1781. In 1786 delegates of five states (the Annapolis Convention) called for a convention of delegates in Philadelphia to amend the Articles—which would require unanimous consent of the thirteen states. The delegates to the Philadelphia Convention convened and deliberated from May to September 1787. Instead of pursuing their official charge they returned a draft (new) Constitution, proposed for constructing and administering a new federal—later also known as "national"—government. They further proposed that the draft Constitution "not" be submitted to the Congress (where it would require unanimous approval of the states); instead that it