March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
June 14 » Hawaii becomes a United States territory.
June 17 » Boxer Rebellion: Western Allied and Japanese forces capture the Taku Forts in Tianjin, China.
June 20 » Boxer Rebellion: The Imperial Chinese Army begins a 55-day siege of the Legation Quarter in Beijing, China.
September 13 » Filipino insurgents defeat a small American column in the Battle of Pulang Lupa, during the Philippine–American War.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of marriage February 21, 1924
The temperature on February 21, 1924 was between -8.1 °C and 4.7 °C and averaged -1.1 °C. There was 0.4 mm of rain. There was 6.3 hours of sunshine (61%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. 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.
February 5 » The Royal Greenwich Observatory begins broadcasting the hourly time signals known as the Greenwich Time Signal.
February 8 » Capital punishment: The first state execution in the United States by gas chamber takes place in Nevada.
April 1 » The Royal Canadian Air Force is formed.
September 17 » The Border Protection Corps is established in the Second Polish Republic for the defence of the eastern border against armed Soviet raids and local bandits.
October 31 » World Savings Day is announced in Milan, Italy by the Members of the Association at the 1st International Savings Bank Congress (World Society of Savings Banks).
November 23 » Edwin Hubble's discovery, that the Andromeda "nebula" is actually another island galaxy far outside of our own Milky Way, is first published in The New York Times.
When copying data from this family tree, please include a reference to the origin: Kees Weststrate, "Family tree Weststrate", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weststrate/I152.php : accessed January 13, 2026), "Catharina de Jonge (1900-)".
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