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
Constitution of California adopted the constitution at the 1849 Constitutional Convention, held beginning on September 3 in Monterey, and voters approved the new constitution on November 13, 1849. Adoption of the "state" constitution actually preceded California's Admission to the Union on September 9, 1850 by almost ten months. A second constitutional convention, the Sacramento Convention of 1878–79, amended the original document, ratifying the amended constitution on 7 May 1879. The Constitution of California is one of the longest collections of laws in the world, partially due to provisions enacted during the Progressive Era limiting powers of elected officials, but largely due to additions