February 15 » The association football club Alianza Lima is founded in Lima, Peru, under the name Sport Alianza.
April 25 » New York becomes the first U.S. state to require automobile license plates.
June 17 » The College Board introduces its first standardized test, the forerunner to the SAT.
October 24 » Annie Edson Taylor becomes the first person to go over Niagara Falls in a barrel.
December 10 » The first Nobel Prize ceremony is held in Stockholm on the fifth anniversary of Alfred Nobel's death.
December 12 » Guglielmo Marconi receives the first transatlantic radio signal (the letter "S" [***] in Morse Code), at Signal Hill in St John's, Newfoundland.
Day of marriage July 1, 1921
The temperature on July 1, 1921 was between 9.6 °C and 18.4 °C and averaged 13.1 °C. There was 3.0 hours of sunshine (18%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. 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 12 » Bolsheviks launch a revolt in Georgia as a preliminary to the Red Army invasion of Georgia.
February 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
July 29 » Adolf Hitler becomes leader of the National Socialist German Workers Party.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
November 11 » The Tomb of the Unknowns is dedicated by US President Warren G. Harding at Arlington National Cemetery.
November 14 » The Communist Party of Spain is founded, and issues the first edition of Mundo obrero.
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/I102493.php : accessed February 18, 2026), "Jantina Ossel (1901-)".
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