January 31 » Czechoslav Trade Union Association is founded in Prague.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
July 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
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.
December 6 » London becomes the world's first city to host licensed taxicabs.
Day of marriage February 5, 1921
The temperature on February 5, 1921 was between 0.9 °C and 4.7 °C and averaged 2.8 °C. There was 0.5 hours of sunshine (5%). 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.
February 21 » Constituent Assembly of the Democratic Republic of Georgia adopts the country's first constitution.
March 31 » The Royal Australian Air Force is formed.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
July 2 » World War I: U.S. President Warren G. Harding signs the Knox–Porter Resolution formally ending the war between the United States and Germany.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
December 22 » Opening of Visva-Bharati College, also known as Santiniketan College, now Visva Bharati University, India.
Day of death July 12, 1966
The temperature on July 12, 1966 was between 8.7 °C and 19.6 °C and averaged 15.6 °C. There was 0.4 hours of sunshine (2%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 15 » The First Nigerian Republic, led by Abubakar Tafawa Balewa is overthrown in a military coup d'état.
June 8 » An F-104 Starfighter collides with XB-70 Valkyrie prototype no. 2, destroying both aircraft during a photo shoot near Edwards Air Force Base. Joseph A. Walker, a NASA test pilot, and Carl Cross, a United States Air Force test pilot, are both killed.
June 8 » Topeka, Kansas, is devastated by a tornado that registers as an "F5" on the Fujita scale: The first to exceed US$100million in damages. Sixteen people are killed, hundreds more injured, and thousands of homes damaged or destroyed.
June 30 » The National Organization for Women, the United States' largest feminist organization, is founded.
October 14 » The city of Montreal begins the operation of its underground Montreal Metro rapid transit system.
October 22 » The Supremes become the first all-female music group to attain a No. 1 selling album (The Supremes A' Go-Go).
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/I197111.php : accessed October 19, 2026), "Gosse Hartsema (1897-1966)".
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