OK, OK I'll do the wikimeme:
1980 - The Solidarity trade union is formed in Poland.
1920 - Polish-Bolshevik War: A decisive Polish victory in the Battle of Komarów.
1997 - Diana, Princess of Wales, dies in a car crash in Paris.
12 - Gaius Caligula, Roman Emperor (d. 41)
1945 - Itzhak Perlman, Israeli violinist
651 - Saint Aidan of Lindisfarne, Irish bishop and missionary