March 18 » AFC Ajax Amsterdam, The Netherlands's biggest and most successful football club, was founded.
April 2 » The United States Congress passes the Foraker Act, giving Puerto Rico limited self-rule.
August 3 » The Firestone Tire and Rubber Company is founded.
August 14 » The Eight-Nation Alliance occupies Beijing, China, in a campaign to end the bloody Boxer Rebellion in China.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage February 23, 1921
The temperature on February 23, 1921 was between -2.6 °C and 10.8 °C and averaged 3.6 °C. There was 9.1 hours of sunshine (87%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. 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.
June 15 » Bessie Coleman earns her pilot's license, becoming the first female pilot of African-American descent.
July 10 » Belfast's Bloody Sunday: Sixteen people are killed and 161 houses destroyed during rioting and gun battles in Belfast, Northern Ireland.
August 3 » Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.
September 11 » Nahalal, the first moshav in Palestine, is settled as part of a Zionist plan of creating a Jewish state, later to be Israel.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
October 5 » The World Series is the first to be broadcast on radio.
Day of death July 26, 1949
The temperature on July 26, 1949 was between 15.8 °C and 26.5 °C and averaged 20.0 °C. There was 11.5 hours of sunshine (73%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
February 15 » Gerald Lankester Harding and Roland de Vaux begin excavations at Cave 1 of the Qumran Caves, where they will eventually discover the first seven Dead Sea Scrolls.
May 6 » EDSAC, the first practical electronic digital stored-program computer, runs its first operation.
July 27 » Initial flight of the de Havilland Comet, the first jet-powered airliner.
September 17 » The Canadian steamship SSNoronic burns in Toronto Harbour with the loss of over 118 lives.
September 27 » Zeng Liansong's design is chosen as the flag of the People's Republic of China.
December 10 » Chinese Civil War: The People's Liberation Army begins its siege of Chengdu, the last Kuomintang-held city in mainland China, forcing President of the Republic of China Chiang Kai-shek and his government to retreat to Taiwan.
When copying data from this family tree, please include a reference to the origin: Nico de Kunder, "Family tree De Kunder", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-kunder/I6835.php : accessed February 17, 2026), "Simon Dingemanse (1900-1949)".
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