Question

when was the U.S constitution written?

Answer 1

September 17, 1787

Answer 2

This was the same place the Declaration of Independence was signed. The Constitution was written during the Philadelphia Convention—now known as the Constitutional Convention—which convened from May 25 to September 17, 1787. It was signed on September 17, 1787.

Answer 3

@mgmk got that from searching google. Google got it from this link http://constitutioncenter.org/learn/educational-resources/constitution-faqs/

Answer 4

September 17, 1787
The Constitution was written during the Philadelphia Convention—now known as the Constitutional Convention—which convened from May 25 to September 17, 1787. It was signed on September 17, 1787.