On which date was the Constitution signed?

The Constitution of the United States was signed on September 17, 1787, during the Constitutional Convention held in Philadelphia. This date is significant as it marks the culmination of efforts to replace the Articles of Confederation with a new framework of government. The signing was a critical moment in American history, as the Constitution laid the foundation for the federal government and established fundamental principles such as the separation of powers and checks and balances. The choice of this specific date is recognized and commemorated in the United States, reinforcing its importance in the establishment of the nation’s legal system and governance.