April 20 » Pierre and Marie Curie refine radium chloride.
May 8 » In Martinique, Mount Pelée erupts, destroying the town of Saint-Pierre and killing over 30,000 people. Only a handful of residents survive the blast.
June 24 » King Edward VII of the United Kingdom develops appendicitis, delaying his coronation.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Cadillac Motor Company is founded.
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.
Day of marriage April 7, 1931
The temperature on April 7, 1931 was between -2.0 °C and 12.7 °C and averaged 5.9 °C. There was 0.1 mm of rain during 0.2 hours. There was 11.3 hours of sunshine (85%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 20 » The U.S. Congress approves the construction of the San Francisco–Oakland Bay Bridge by the state of California.
March 3 » The United States adopts The Star-Spangled Banner as its national anthem.
March 31 » A Transcontinental & Western Air airliner crashes near Bazaar, Kansas, killing eight, including University of Notre Dame head football coach Knute Rockne.
May 14 » Five unarmed civilians are killed in the Ådalen shootings, as the Swedish military is called in to deal with protesting workers.
September 18 » The Mukden Incident gives Japan a pretext to invade and occupy Manchuria.
October 21 » A secret society in the Imperial Japanese Army launches an abortive coup d'état attempt.
When copying data from this family tree, please include a reference to the origin: J. van Broekhoven, "Database Van Broekhoven", database, Genealogy Online (https://www.genealogieonline.nl/database-van-broekhoven/I69010.php : accessed January 28, 2026), "Hendrikus Gerardus Klerks (1902-)".
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