March 7 » Second Boer War: Boers, led by Koos de la Rey, inflict the biggest defeat upon the British since the beginning of the war, at Tweebosch.
April 14 » James Cash Penney opens his first store in Kemmerer, Wyoming.
April 20 » Pierre and Marie Curie refine radium chloride.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
November 21 » The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
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.
April 26 » The Duke of York weds Lady Elizabeth Bowes-Lyon at Westminster Abbey.
June 9 » Bulgaria's military takes over the government in a coup.
June 27 » Capt. Lowell H. Smith and Lt. John P. Richter perform the first ever aerial refueling in a DH.4B biplane.
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 29 » The British Mandate for Palestine takes effect, creating Mandatory Palestine.
October 6 » The Turkish National Movement enters Constantinople.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I65460.php : accessed February 26, 2026), "Grietje de Groot (1902-)".
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