January 28 » The Carnegie Institution of Washington is founded in Washington, D.C. with a $10 million gift from Andrew Carnegie.
March 6 » Real Madrid CF is founded.
April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Cadillac Motor Company is founded.
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.
Day of marriage December 24, 1927
The temperature on December 24, 1927 was between 1.2 °C and 5.3 °C and averaged 3.4 °C. There was 1.8 mm of rain. The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
February 23 » German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
June 26 » The Cyclone roller coaster opens on Coney Island.
June 27 » Prime Minister of Japan Tanaka Giichi convenes an eleven-day conference to discuss Japan's strategy in China. The Tanaka Memorial, a forged plan for world domination, is later claimed to be a secret report leaked from this conference.
June 29 » The Bird of Paradise, a U.S. Army Air Corps Fokker tri-motor, completes the first transpacific flight, from the mainland United States to Hawaii.
November 12 » Leon Trotsky is expelled from the Soviet Communist Party, leaving Joseph Stalin in undisputed control of the Soviet Union.
December 30 » The Ginza Line, the first subway line in Asia, opens in Tokyo, Japan.
Day of death May 10, 1993
The temperature on May 10, 1993 was between 11.6 °C and 25.2 °C and averaged 18.0 °C. There was 1.5 mm of rain during 1.2 hours. There was 10.7 hours of sunshine (70%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 14 » In Poland's worst peacetime maritime disaster, ferry MS Jan Heweliusz sinks off the coast of Rügen, drowning 55 passengers and crew; nine crew-members are saved.
January 20 » Bill Clinton is inaugurated the 42nd President of the United States of America.
March 24 » Discovery of Comet Shoemaker-Levy 9.
August 9 » The Liberal Democratic Party of Japan loses a 38-year hold on national leadership.
August 28 » The Galileo spacecraft discovers a moon, later named Dactyl, around 243 Ida, the first known asteroid moon.
December 2 » Colombian drug lord Pablo Escobar is shot and killed in Medellín.
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/I84764.php : accessed October 10, 2026), "Hendrik Koops (1902-1993)".
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