3rd » The first unsolicited bulk commercial e-mail (which would later become known as "spam (electronic) named spam") is sent by a Digital Equipment Corporation marketing representative to every ARPANET address on the west coast of the United States.
8th » The first ascent of Mount Everest without supplemental oxygen, by Reinhold Messner and Peter Habeler.
12th » In Zaire, rebels occupy the city of Kolwezi, the mining center of the province of Katanga Province or Shaba (now known as Katanga). The local government asks the U.S.A., France and Belgium to restore order.