Question: når ble usa's grunnlov signert
Answer: 1787-09-17; 1787 September 17; 1787-09-17; 09 17 1787; 09-17-1787; 1787 09 17; 1787 september, 17; 17-09-1787; 09/17/1787; 17/09/1787; 17 September 1787; 17 09 1787