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.
April 20 » Pierre and Marie Curie refine radium chloride.
May 31 » Second Boer War: The Treaty of Vereeniging ends the war and ensures British control of South Africa.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Cadillac Motor Company is founded.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
Day of marriage May 26, 1923
The temperature on May 26, 1923 was between 3.5 °C and 14.9 °C and averaged 10.1 °C. There was 4.8 hours of sunshine (30%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 9 » Juan de la Cierva makes the first autogyro flight.
January 9 » Lithuanian residents of the Memel Territory rebel against the League of Nations' decision to leave the area as a mandated region under French control.
February 10 » Texas Tech University is founded as Texas Technological College in Lubbock, Texas
March 3 » TIME magazine is published for the first time.
April 15 » Insulin becomes generally available for use by people with diabetes.
June 9 » Bulgaria's military takes over the government in a coup.
Day of death February 21, 1980
The temperature on February 21, 1980 was between 1.4 °C and 10.3 °C and averaged 4.8 °C. There was 8.9 hours of sunshine (86%). The almost cloudless was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
January 27 » Through cooperation between the U.S. and Canadian governments, six American diplomats secretly escape hostilities in Iran in the culmination of the Canadian Caper.
February 17 » First winter ascent of Mount Everest by Krzysztof Wielicki and Leszek Cichy.
June 3 » The 1980 Grand Island tornado outbreak hits Nebraska, causing five deaths and $300million (equivalent to $931million in 2019) worth of damage.
July 19 » Opening of the Summer Olympics in Moscow.
October 25 » Proceedings on the Hague Convention on the Civil Aspects of International Child Abduction conclude.
December 2 » Salvadoran Civil War: Four American missionaries are raped and murdered by a death squad.
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/I133534.php : accessed October 24, 2026), "Jan Kuipers (1902-1980)".
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