January 23 » The Malolos Constitution is inaugurated, establishing the First Philippine Republic. Emilio Aguinaldo is sworn in as its first President.
March 6 » Bayer registers "Aspirin" as a trademark.
September 23 » The American Asiatic Squadron destroys a Filipino battery at the Battle of Olongapo.
November 2 » The Boers begin their 118-day siege of British-held Ladysmith during the Second Boer War.
November 28 » The Second Boer War: a British column is engaged by Boer forces at the Battle of Modder River; although the Boers withdraw, the British suffer heavy casualties.
November 29 » FC Barcelona is founded by Catalan, Spanish and Englishmen. It later develops into one of Spanish football's most iconic and strongest teams.
Day of death August 20, 1920
The temperature on August 20, 1920 was between 8.0 °C and 16.1 °C and averaged 11.6 °C. There was 7.1 mm of rain. There was 7.9 hours of sunshine (55%). 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 12 » The Kapp Putsch begins when the Marinebrigade Ehrhardt is ordered to march on Berlin.
August 16 » The congress of the Communist Party of Bukhara opens. The congress would call for armed revolution.
September 7 » Two newly purchased Savoia flying boats crash in the Swiss Alps en route to Finland where they would serve with the Finnish Air Force, killing both crews.
October 14 » Finland and Soviet Russia sign the Treaty of Tartu, exchanging some territories.
December 22 » The GOELRO economic development plan is adopted by the 8th Congress of Soviets of the Russian SFSR.
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/I109467.php : accessed October 25, 2026), "Etje Kalsbeek (1899-1920)".
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