17 September 2026 marks 239 years since the signing of the United States Constitution. In the summer of 1787, delegates met at the State House in Philadelphia, now Independence Hall. Their original brief was to address weaknesses in the Articles of Confederation. The Convention instead produced a new federal framework of government.

The National Archives records that the final draft was approved on 15 September 1787, engrossed on parchment and prepared for signing two days later. Thirty-eight delegates signed in person. George Read also signed for the absent John Dickinson, bringing the number of signatures to 39. George Washington, president of the Convention, signed first.

Not every participant agreed. George Mason, Elbridge Gerry and Edmund Randolph refused to sign. The disputes included the power of the new central government and the absence of an explicit bill of rights. Signing did not immediately put the Constitution into force: Article VII required ratification by nine of the 13 states.

The public debate that followed was intense. Supporters argued that the union needed a government able to act. Critics demanded clearer guarantees of liberty. That tension later contributed, after ratification, to the adoption of the first ten amendments, known as the Bill of Rights.

The text signed in Philadelphia established a federal structure and separated legislative, executive and judicial powers. The original four-page document is preserved by the National Archives and displayed in Washington, D.C. It remains the foundation of the American constitutional order.

17 September therefore marks the moment the delegates signed the parchment, not the day the Constitution took effect. Ratification, the first Congress and the inauguration of the president followed in the years immediately afterwards. Two hundred and thirty-nine years later, the date remains a central marker in United States constitutional history.

Photo: National Archives of the United States, page 1 of the Constitution. Public domain (US federal government work). Cropped to 16:9.

Source consulted: The Constitution of the United States | National Archives; How Did it Happen? | National Archives.