In September of 1787, the Founding Fathers signed the most influential document in American history, the U.S. Constitution.
https://constitutioncenter.org/learn/civic-calendar/constitution-day-civic-holiday
President Biden's 2023 Proclamation on Constitution Day
For more than two centuries, women and men have struggled and strived to make good on the promise of our founding document and to expand the promise of America by amending our Constitution in accordance with our growth and progress as a Nation — just as the Framers envisioned they would. Through Civil War, the fight for universal suffrage, and the heroic non-violent resistance of the Civil Rights Movement — from Seneca Falls to Selma and countless acts of civic bravery beyond — courageous Americans have fought, sacrificed, and changed hearts and minds to deliver the full breadth of human dignity to which our Constitution aspires. Fully realizing these ideals and attaining justice for all remains an urgent and enduring imperative.
Benjamin Franklin and the Constitution - Podcast about Benjamin Franklin's Role in the US Constitution
George Washington's Constitutional Legacy - Podcast about George Washington's Role pursuant to the Constitution