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 2 » "Electric Theatre", the first full-time movie theater in the United States, opens in Los Angeles.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
June 28 » The U.S. Congress passes the Spooner Act, authorizing President Theodore Roosevelt to acquire rights from Colombia for the Panama Canal.
August 22 » Cadillac Motor Company is founded.
Day of marriage February 20, 1928
The temperature on February 20, 1928 was between 4.5 °C and 9.8 °C and averaged 6.3 °C. There was 3.1 hours of sunshine (30%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
June 9 » Charles Kingsford Smith completes the first trans-Pacific flight in a Fokker Trimotor monoplane, the Southern Cross.
September 18 » Juan de la Cierva makes the first autogyro crossing of the English Channel.
October 1 » The Soviet Union introduces its first five-year plan.
October 28 » The "Indonesia Raya", now the national anthem, is first played during the Second Indonesian Youth Congress.
November 15 » The RNLI lifeboat Mary Stanford capsized in Rye Harbour with the loss of the entire 17-man crew.
December 6 » The government of Colombia sends military forces to suppress a month-long strike by United Fruit Company workers, resulting in an unknown number of deaths.
Day of death January 10, 1953
The temperature on January 10, 1953 was between -0.5 °C and 4.1 °C and averaged 1.5 °C. There was 0.1 mm of rain during 0.3 hours. There was 3.4 hours of sunshine (42%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
January 5 » The play Waiting for Godot by Samuel Beckett receives its première in Paris.
February 28 » James Watson and Francis Crick announce to friends that they have determined the chemical structure of DNA; the formal announcement takes place on April 25 following publication in April's Nature (pub. April 2).
March 1 » Soviet Premier Joseph Stalin suffers a stroke and collapses; he dies four days later.
April 25 » Francis Crick and James Watson publish "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid" describing the double helix structure of DNA.
May 18 » Jackie Cochran becomes the first woman to break the sound barrier.
October 1 » A Mutual Defense Treaty Between the United States and the Republic of Korea is concluded in Washington, D.C.
When copying data from this family tree, please include a reference to the origin: Van Knippenberg, "Family tree Van Knippenberg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-knippenberg/I1998.php : accessed February 25, 2026), "Leonardus Hermans (1902-1953)".
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