On what date was the United States Constitution signed at the convention linked to America250?

The United States Constitution was signed on September 17, 1787, at the convention linked to America250.

The signing took place at Independence Hall in Philadelphia after the Constitutional Convention had worked for about four months. The delegates had met to address problems under the Articles of Confederation but ultimately produced an entirely new framework for the federal government.

Thirty-nine delegates signed the document, representing twelve states. Rhode Island did not send delegates to the convention. George Washington, who presided over the convention, signed along with Benjamin Franklin and other prominent delegates.

The signing did not immediately put the Constitution into effect. It still required ratification by conventions in the states. New Hampshire became the ninth state to ratify it on June 21, 1788, and the new federal government began operating in 1789.