January 1 » New York, New York annexes land from surrounding counties, creating the City of Greater New York. The four initial boroughs, Manhattan, Brooklyn, Queens, and The Bronx, are joined on January 25 by Staten Island to create the modern city of five boroughs.
February 27 » King George I of Greece survives an assassination attempt.
June 11 » The Hundred Days' Reform, a planned movement to reform social, political, and educational institutions in China, is started by the Guangxu Emperor, but is suspended by Empress Dowager Cixi after 104 days. (The failed reform led to the abolition of the Imperial examination in 1905.)
August 23 » The Southern Cross Expedition, the first British venture of the Heroic Age of Antarctic Exploration, departs from London.
October 6 » Phi Mu Alpha Sinfonia, the largest American music fraternity, is founded at the New England Conservatory of Music.
December 18 » Gaston de Chasseloup-Laubat sets the first officially recognized land speed record of 39.245mph (63.159km/h) in a Jeantaud electric car.
Day of marriage July 17, 1923
The temperature on July 17, 1923 was between 13.3 °C and 19.3 °C and averaged 16.0 °C. There was 1.7 hours of sunshine (10%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I65622.php : accessed January 28, 2026), "Fokko Koster (1898-????)".
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