1999: The Dow Jones Industrial Average closes above the 10,000 mark (10,006.78) for the first time, during the height of the dot-com bubble.
1993: Catherine Callbeck becomes premier of Prince Edward Island and the first woman to be elected in a general election as premier of a Canadian province.
1990: The Czechoslovak parliament is unable to reach an agreement on what to call the country after the fall of Communism, sparking the so-called Hyphen War.
1984: The Baltimore Colts load its possessions onto fifteen Mayflower moving trucks in the early morning hours and transfer its operations to Indianapolis.
1971: My Lai Massacre: Lieutenant William Calley is convicted of premeditated murder and sentenced to life in prison.
1962: Arturo Frondizi, the president of Argentina, is overthrown in a military coup by Argentina's armed forces, ending an 11½ day constitutional crisis.
1936: In Germany, Adolf Hitler receives 99% of the votes in a referendum to ratify Germany's illegal remilitarization and reoccupation of the Rhineland, receiving 44.5 million votes out of 45.5 million registered voters.
1806: Construction is authorized of the Great National Pike, better known as the Cumberland Road, becoming the first United States federal highway.
1792: King Gustav III of Sweden dies after being shot in the back at a midnight masquerade ball at Stockholm's Royal Opera 13 days earlier. He is succeeded by Gustav IV Adolf.
1632: Treaty of Saint-Germain is signed returning Quebec to French control after the English had seized it in 1629.
1500: Cesare Borgia is given the title of Captain General and Gonfalonier by his father Rodrigo Borgia after returning from his conquests in the Romagna.