The temperature on April 8, 1921 was between -0.7 °C and 12.4 °C and averaged 6.5 °C. There was 10.3 hours of sunshine (77%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. 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.
February 27 » The International Working Union of Socialist Parties is founded in Vienna.
July 11 » A truce in the Irish War of Independence comes into effect.
July 27 » Researchers at the University of Toronto, led by biochemist Frederick Banting, prove that the hormone insulin regulates blood sugar.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
October 13 » Soviet republics sign the Treaty of Kars to formalize the borders between Turkey and the South Caucasus states.
Day of marriage July 31, 1940
The temperature on July 31, 1940 was between 13.0 °C and 20.7 °C and averaged 16.4 °C. There was 2.3 hours of sunshine (15%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
May 6 » John Steinbeck is awarded the Pulitzer Prize for his novel The Grapes of Wrath.
May 17 » World War II: Germany occupies Brussels, Belgium.
June 21 » World War II: Italy begins an unsuccessful invasion of France.
July 10 » World War II: The Vichy government is established in France.
November 16 » New York City's "Mad Bomber" George Metesky places his first bomb at a Manhattan office building used by Consolidated Edison.
November 27 » In Romania, the ruling Iron Guard fascist party assassinates over 60 of arrested King Carol II of Romania's aides and other political dissidents.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I532291.php : accessed March 5, 2026), "Henderika Penning (1921-< 2019)".
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