The temperature on January 1, 1921 was between 7.9 °C and 12.4 °C and averaged 10.6 °C. There was 6.8 mm of rain. There was 0.1 hours of sunshine (1%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
February 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
July 11 » A truce in the Irish War of Independence comes into effect.
October 26 » The Chicago Theatre opens.
October 29 » The Link River Dam, a part of the Klamath Reclamation Project, is completed.
November 11 » The Tomb of the Unknowns is dedicated by US President Warren G. Harding at Arlington National Cemetery.
Day of death February 23, 1943
The temperature on February 23, 1943 was between 0.9 °C and 4.1 °C and averaged 2.8 °C. There was 0.2 mm of rain. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
March 5 » First Flight of the Gloster Meteor, Britain's first combat jet aircraft.
April 19 » Albert Hofmann deliberately doses himself with LSD for the first time, three days after having discovered its effects on April 16.
August 2 » The Holocaust: Jewish prisoners stage a revolt at Treblinka, one of the deadliest of Nazi death camps where approximately 900,000 persons were murdered in less than 18 months.
September 30 » The United States Merchant Marine Academy is dedicated by President Roosevelt.
October 19 » Streptomycin, the first antibiotic remedy for tuberculosis, is isolated by researchers at Rutgers University.
December 2 » World War II: A Luftwaffe bombing raid on the harbour of Bari, Italy, sinks numerous cargo and transport ships, including the American SSJohn Harvey, which is carrying a stockpile of World War I-era mustard gas.
When copying data from this family tree, please include a reference to the origin: Dirk Zwinderman, "Family tree Zwinderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-zwinderman/I4397.php : accessed January 19, 2026), "Jan Snakenborg (1921-1943)".
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