History of the Day for:
- 1469: Isabella of Castile married Ferdinand II of Aragon, uniting almost all the Christian dominions of Spain under one monarchy.
- 1648: The first American labor organization was formed when the Massachusetts general court granted a charter to Boston's shoemakers.
- 1685: King Louis XIV of France revoked the Edict of Nantes, depriving the Protestant Huguenots of all religious and civil liberties granted them by Henry IV in 1598.
- 1767: The "Mason?Dixon" line became the commonly known boundary between the North and South and officially became the border between Maryland and Pennsylvania.
- 1867: The U.S. flag flew for the first time at Sitka following the purchase of Alaska from Russia for $7.2 million.
- 1870: Benjamin Tilghman patented sandblasting.
- 1873: The first football rules were formulated at a meeting in New York attended by delegates from Columbia, Princeton, Rutgers and Yale.
- 1892: The first long-distance phone line between Chicago and New York was opened.
- 1912: The first Balkan War began.
- 1955: Scientists at the University of California at Berkeley discovered a new atomic subparticle called a negative proton (antiproton).
- 1962: U.S. Dr. James Watson and Britons Dr. Francis Crick and Dr. Maurice Wilkins won the Nobel Prize for Medicine and Physiology for their work in DNA.
- 1970: In Canada, the body of Pierre Laporte, the Quebec Minister of Labor, was found following his kidnap by the Quebec Liberation Front.
- 1972: Congress passed the Water Pollution Control Act over President Nixon's veto.
- 1977: German Autumn: a set of events revolving around the kidnapping of Hanns-Martin Schleyer and the hijacking of a Lufthansa flight by the Red Army Faction (RAF) comes to an end when Schleyer is executed and various RAF members allegedly commit suicide.
- 1989: East German leader Erich Honecker resigns.
- 1991: Azerbaijan declares independence from USSR.
- 2003: Bolivian Gas War: President Gonzalo Sánchez de Lozada, is forced to resign and leave Bolivia.
- 2007: Karachi bombings: attempted assination of Benazir Bhutto.