Comet Shoemaker–Levy 9 collides with Jupiter. The Jupiter orbiting comet collided with Jupiter. It was the first time in recorded history that Astronomers had observed a collision between two celestial objects.
Orly Airport attack. A Turkish Airlines check-in counter was bombed at the Orly Airport in Paris, killing 8 people and injuring more than 50 people. The Armenian militant organization ASALA took responsibility for the attack.
Battle of Grunwald (2nd Battle of Tannenburg), one of Medieval Europe's largest battles during Poland-Lithuanian Teutonic War. Polish King Władysław Jagiełło and Lithuanian Grand Duke Vytautas defeat Teutonic Ulrich von Jungingen.