The temperature on February 17, 1921 was between -2.0 °C and 8.4 °C and averaged 3.5 °C. There was 0.2 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. 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.
March 6 » Portuguese Communist Party is founded as the Portuguese Section of the Communist International.
March 20 » The Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
June 12 » Mikhail Tukhachevsky orders the use of chemical weapons against the Tambov Rebellion, bringing an end to the peasant uprising.
August 23 » British airship R-38 experiences structural failure over Hull in England and crashes in the Humber Estuary. Of her 49 British and American training crew, only four survive.
October 13 » Soviet republics sign the Treaty of Kars to formalize the borders between Turkey and the South Caucasus states.
When copying data from this family tree, please include a reference to the origin: Dimitri Reinderman, "Family tree Reinderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-reinderman/I27367.php : accessed February 20, 2026), "Antoon Koomen (± 1895-????)".
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