February 28 » The Second Boer War: The 118-day "Siege of Ladysmith" is lifted.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
July 2 » The first Zeppelin flight takes place on Lake Constance near Friedrichshafen, Germany.
August 3 » The Firestone Tire and Rubber Company is founded.
September 13 » Filipino insurgents defeat a small American column in the Battle of Pulang Lupa, during the Philippine–American War.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage September 17, 1920
The temperature on September 17, 1920 was between 9.9 °C and 17.6 °C and averaged 13.5 °C. There was 1.7 mm of rain. There was 5.7 hours of sunshine (45%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 2 » The second Palmer Raid, ordered by the US Department of Justice, results in 6,000 suspected communists and anarchists being arrested and held without trial.
January 7 » The New York State Assembly refuses to seat five duly elected Socialist assemblymen.
March 13 » The Kapp Putsch briefly ousts the Weimar Republic government from Berlin.
April 28 » Azerbaijan is added to the Soviet Union.
August 13 » Polish–Soviet War: The Battle of Warsaw begins and will last till August 25. The Red Army is defeated.
August 16 » Polish–Soviet War: The Battle of Radzymin concludes; the Soviet Red Army is forced to turn away from Warsaw.
Day of death March 6, 1951
The temperature on March 6, 1951 was between -3.2 °C and 8.2 °C and averaged 1.8 °C. There was 0.1 mm of rain. There was 4.0 hours of sunshine (36%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
In The Netherlands , there was from March 15, 1951 to September 2, 1952 the cabinet Drees I, with Dr. W. Drees (PvdA) as prime minister.
February 25 » The first Pan American Games are officially opened in Buenos Aires by Argentine President Juan Perón.
March 15 » Iranian oil industry is nationalized.
March 31 » Remington Rand delivers the first UNIVAC I computer to the United States Census Bureau.
April 17 » The Peak District becomes the United Kingdom's first National Park.
May 13 » The 400th anniversary of the founding of the National University of San Marcos is commemorated by the opening of the first large-capacity stadium in Peru.
May 23 » Tibetans sign the Seventeen Point Agreement with China.
When copying data from this family tree, please include a reference to the origin: Rik Plomp, "Pedigree Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plomp/I1868.php : accessed January 9, 2026), "Jannetje Kosters (1900-1951)".
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