March 7 » Second Boer War: Boers, led by Koos de la Rey, inflict the biggest defeat upon the British since the beginning of the war, at Tweebosch.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
November 21 » The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game.
November 29 » The Pittsburgh Stars defeated the Philadelphia Athletics, 11–0 to win the first championship associated with an American national professional football league.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of death August 20, 1970
The temperature on August 20, 1970 was between 12.8 °C and 19.7 °C and averaged 16.2 °C. There was 0.1 mm of rain. There was 4.1 hours of sunshine (28%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 22 » The Boeing 747, the world's first "jumbo jet", enters commercial service for launch customer Pan American Airways with its maiden voyage from John F. Kennedy International Airport to London Heathrow Airport.
March 31 » Explorer 1 re-enters the Earth's atmosphere after 12 years in orbit.
April 26 » The Convention Establishing the World Intellectual Property Organization enters into force.
September 30 » Jordan makes a deal with the PFLP for the release of the remaining hostages from the Dawson's Field hijackings.
November 10 » Vietnam War: Vietnamization: For the first time in five years, an entire week ends with no reports of American combat fatalities in Southeast Asia.
December 21 » First flight of F-14 multi-role combat aircraft.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I138491.php : accessed October 16, 2026), "Johannes Boersma (1902-1970)".
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