The temperature on February 17, 1911 was between 7.2 °C and 10.6 °C and averaged 8.7 °C. There was 0.3 hours of sunshine (3%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west. Source: KNMI
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
September 20 » The White Star Line's RMSOlympic collides with the British warship HMSHawke.
September 24 » His Majesty's Airship No. 1, Britain's first rigid airship, is wrecked by strong winds before her maiden flight at Barrow-in-Furness.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
December 9 » A mine explosion near Briceville, Tennessee, kills 84 miners despite rescue efforts led by the United States Bureau of Mines.
Day of death November 17, 1923
The temperature on November 17, 1923 was between 2.4 °C and 7.9 °C and averaged 5.1 °C. There was 2.7 mm of rain. There was 0.4 hours of sunshine (5%). The average windspeed was 4 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.
February 15 » Greece becomes the last European country to adopt the Gregorian calendar.
April 15 » Insulin becomes generally available for use by people with diabetes.
July 1 » The Parliament of Canada suspends all Chinese immigration.
August 23 » Captain Lowell Smith and Lieutenant John P. Richter performed the first mid-air refueling on De Havilland DH-4B, setting an endurance flight record of 37 hours.
September 1 » The Great Kantō earthquake devastates Tokyo and Yokohama, killing about 105,000 people.
November 8 » Beer Hall Putsch: In Munich, Adolf Hitler leads the Nazis in an unsuccessful attempt to overthrow the German government.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I7891.php : accessed March 17, 2026), "Dirk Keijzer (1911-1923)".
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