January 18 » An X-ray generating machine is exhibited for the first time by H. L. Smith.
March 1 » Henri Becquerel discovers radioactive decay.
May 18 » The United States Supreme Court rules in Plessy v. Ferguson that the "separate but equal" doctrine is constitutional.
August 27 » Anglo-Zanzibar War: The shortest war in world history (09:02 to 09:40), between the United Kingdom and Zanzibar.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
December 10 » Alfred Jarry's Ubu Roi premieres in Paris. A riot breaks out at the end of the performance.
Day of marriage April 21, 1920
The temperature on April 21, 1920 was between 2.0 °C and 9.8 °C and averaged 7.2 °C. There was 3.9 mm of rain. There was 1.5 hours of sunshine (11%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-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.
February 10 » About 75% of the population in Zone I votes to join Denmark in the 1920 Schleswig plebiscites.
June 11 » During the U.S. Republican National Convention in Chicago, U.S. Republican Party leaders gathered in a room at the Blackstone Hotel to come to a consensus on their candidate for the U.S. presidential election, leading the Associated Press to coin the political phrase "smoke-filled room".
July 15 » The Polish Parliament establishes Silesian Voivodeship before the Polish-German plebiscite.
August 20 » The National Football League is organized as the American Professional Football Conference in Canton, Ohio
November 15 » First assembly of the League of Nations is held in Geneva, Switzerland.
November 21 » Irish War of Independence: In Dublin, 31 people are killed in what became known as "Bloody Sunday".
When copying data from this family tree, please include a reference to the origin: L. Vlastra, "Family tree Vlastra", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-vlastra/I42000.php : accessed June 15, 2024), "Dirk Pronk (1896-????)".
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