February 1 » La bohème premieres in Turin at the Teatro Regio (Turin), conducted by the young Arturo Toscanini.
May 26 » Charles Dow publishes the first edition of the Dow Jones Industrial Average.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
June 28 » An explosion in the Newton Coal Company's Twin Shaft Mine in Pittston, Pennsylvania results in a massive cave-in that kills 58 miners.
August 17 » Bridget Driscoll became the first recorded case of a pedestrian killed in a collision with a motor car in the United Kingdom.
November 1 » A picture showing the bare breasts of a woman appears in National Geographic magazine for the first time.
Day of marriage January 31, 1921
The temperature on January 31, 1921 was between 2.8 °C and 9.7 °C and averaged 6.2 °C. There was 1.6 hours of sunshine (18%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. 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 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
March 6 » Portuguese Communist Party is founded as the Portuguese Section of the Communist International.
March 31 » The Royal Australian Air Force is formed.
July 11 » Former president of the United States William Howard Taft is sworn in as 10th chief justice of the U.S. Supreme Court, becoming the only person ever to hold both offices.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
November 4 » The Saalschutz Abteilung (hall defense detachment) of the Nazi Party is renamed the Sturmabteilung (storm detachment) after a large riot in Munich.
When copying data from this family tree, please include a reference to the origin: Jac. Linders, "Family tree Linders", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_linders/I12015.php : accessed March 4, 2026), "Johannes Hermans (1896-????)".
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