The temperature on September 4, 1920 was between 11.7 °C and 17.5 °C and averaged 14.3 °C. There was 3.2 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-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 13 » The Reichstag Bloodbath of January 13, 1920, the bloodiest demonstration in German history.
January 17 » Alcohol Prohibition begins in the United States as the Volstead Act goes into effect.
May 3 » A Bolshevik coup fails in the Democratic Republic of Georgia.
July 29 » Construction of the Link River Dam begins as part of the Klamath Reclamation Project.
August 18 » The Nineteenth Amendment to the United States Constitution is ratified, guaranteeing women's suffrage.
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.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I4183.php : accessed January 24, 2026), "Gettje Grouwstra (1920-)".
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