New Jersey became the third state to ratify the US constitution.
Pennsylvania became the second state to ratify the US constitution.
Delaware became the first state to ratify the US constitution.
Wolfgang Amadeus Mozart's opera 'Don Giovanni' premiered in Prague.
39 out of 50 delegates signed the US Constitution and shared it publicly.
The Northwest Ordinance was enacted; it is considered one of the most important legislative acts that the Confederation Congress of the US passed.
Delegates started to gather in Philadelphia to draw up the US constitution.
Astronomer Sir William Herschel discovered the first two moons of Uranus, Titania & Oberon.
