February 28 » Queen Ranavalona III, the last monarch of Madagascar, is deposed by a French military force.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage May 11, 1923
The temperature on May 11, 1923 was between 1.5 °C and 10.4 °C and averaged 5.7 °C. There was 9.4 mm of rain. There was 0.2 hours of sunshine (1%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 9 » Lithuanian residents of the Memel Territory rebel against the League of Nations' decision to leave the area as a mandated region under French control.
July 24 » The Treaty of Lausanne, settling the boundaries of modern Turkey, is signed in Switzerland by Greece, Bulgaria and other countries that fought in World War I.
September 4 » Maiden flight of the first U.S. airship, the USSShenandoah.
September 29 » The First American Track & Field championships for women are held.
September 29 » The French Mandate for Syria and the Lebanon takes effect.
November 8 » Beer Hall Putsch: In Munich, Adolf Hitler leads the Nazis in an unsuccessful attempt to overthrow the German government.
Day of death January 20, 1981
The temperature on January 20, 1981 was between -1.1 °C and 2.8 °C and averaged 0.6 °C. There was 1.2 mm of rain during 0.9 hours. There was 1.9 hours of sunshine (22%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
March 5 » The ZX81, a pioneering British home computer, is launched by Sinclair Research and would go on to sell over 1⁄2 million units around the world.
April 27 » Xerox PARC introduces the computer mouse.
May 21 » Transamerica Corporation agrees to sell United Artists to Metro-Goldwyn-Mayer for $380million after the box office failure of the 1980 film Heaven's Gate.
June 13 » At the Trooping the Colour ceremony in London, a teenager, Marcus Sarjeant, fires six blank shots at Queen Elizabeth II.
July 7 » US President Ronald Reagan appoints Sandra Day O'Connor to become the first female member of the Supreme Court of the United States.
July 30 » As many as 50,000 demonstrators, mostly women and children, took to the streets in Łódź to protest food ration shortages in Communist Poland.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I108837.php : accessed February 17, 2026), "Roel de Boer (1897-1981)".
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