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
Article Seven of the United States Constitution Article Seven of the United States Constitution Article Seven of the United States Constitution sets the number of state ratifications necessary in order for the Constitution to take effect and prescribes the method through which the states may ratify it. Under the terms of Article VII, constitutional ratification conventions were held in each of the thirteen states, with the ratification of nine states required for the Constitution take effect. Delaware was the first state to ratify the Constitution, doing so on December 7, 1787. On June 21, 1788, New Hampshire became the ninth state to ratify the Constitution, ensuring that