<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The Signing of the United States Constitution occurred on September 17, 1787, at Independence Hall in Philadelphia, Pennsylvania, when 39 delegates to the Constitutional Convention, representing 12 states (all but Rhode Island, which declined to send delegates), endorsed the Constitution created during the four - month - long convention . In addition to signatures, this endorsement, the Constitution's eschatocol, included a brief declaration that the delegates' work has been successfully completed and that those whose signatures appear on it subscribe to the final document . Included are, a statement pronouncing the document's adoption by the states present, a formulaic dating of its adoption, along with the signatures of those endorsing it . Additionally, the convention's secretary, William Jackson, signed the document to authenticate the validity of the delegate signatures . He also made a few secretarial notes . </P> <P> The language of the concluding endorsement, conceived by Gouverneur Morris and presented to the convention by Benjamin Franklin, was made intentionally ambiguous in hopes of winning over the votes of dissenting delegates . Advocates for the new frame of government, realizing the impending difficulty of obtaining the consent of the states needed for it to become operational, were anxious to obtain the unanimous support of the delegations from each state . It was feared that many of the delegates would refuse to give their individual assent to the Constitution . Therefore, in order that the action of the Convention would appear to be unanimous, the formula, Done in convention by the unanimous consent of the states present...was devised . </P>

When was the constitution of the united states signed