March 22 » Before the Société pour L'Encouragement à l'Industrie, brothers Auguste and Louis Lumière demonstrate movie film technology publicly for the first time.
April 8 » In Pollock v. Farmers' Loan & Trust Co. the Supreme Court of the United States declares unapportioned income tax to be unconstitutional.
May 25 » The Republic of Formosa is formed, with Tang Jingsong as its president.
June 11 » Paris–Bordeaux–Paris, sometimes called the first automobile race in history or the "first motor race", takes place.
June 27 » The inaugural run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City, the first U.S. passenger train to use electric locomotives.
November 5 » George B. Selden is granted the first U.S. patent for an automobile.
Day of marriage July 28, 1921
The temperature on July 28, 1921 was between 14.2 °C and 28.8 °C and averaged 21.8 °C. There was 8.6 hours of sunshine (55%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-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.
March 1 » Following mass protests in Petrograd demanding greater freedom in the RSFSR, the Kronstadt rebellion began, with sailors and citizens taking up arms against the Bolsheviks.
March 17 » The Second Polish Republic adopts the March Constitution.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
May 19 » The United States Congress passes the Emergency Quota Act establishing national quotas on immigration.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
When copying data from this family tree, please include a reference to the origin: Marjo van Leeuwen, "Family tree Van Leeuwen-Van der Speck en vele anderen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-leeuwen-van-der-speck/R5464.php : accessed May 11, 2025), "Willem Wilhelm Mastenbroek (1895-????)".
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