The Constitution of USA was proposed by Convention on: November 9, 2021November 9, 2021 administrator The Constitution of USA was proposed by Convention on:September 17,1787Well Done. Your Answer is Correct Keep it Up!September 17,1778July 4,1776October 15,1785 Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Like this:Like Loading...