The temperature on January 15, 1930 was between 4.1 °C and 10.9 °C and averaged 8.2 °C. There was 0.2 mm of rain during 0.4 hours. There was 0.2 hours of sunshine (2%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. 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.
March 31 » The Motion Picture Production Code is instituted, imposing strict guidelines on the treatment of sex, crime, religion and violence in film, in the U.S., for the next thirty-eight years.
April 22 » The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.
May 1 » "Pluto" is officially proposed for the name of the newly-discovered dwarf planet Pluto by Vesto Slipher in the Lowell Observatory Observation Circular. The name quickly catches on.
June 9 » A Chicago Tribune reporter, Jake Lingle, is killed during rush hour at the Illinois Central train station by Leo Vincent Brothers, allegedly over a $100,000 gambling debt owed to Al Capone.
July 30 » In Montevideo, Uruguay wins the first FIFA World Cup.
September 8 » 3M begins marketing Scotch transparent tape.
Day of marriage March 10, 1952
The temperature on March 10, 1952 was between 4.3 °C and 11.0 °C and averaged 7.2 °C. There was 1.9 mm of rain during 7.5 hours. There was 3.4 hours of sunshine (30%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
April 21 » Secretary's Day (now Administrative Professionals' Day) is first celebrated.
April 28 » The Treaty of San Francisco comes into effect, restoring Japanese sovereignty and ending its state of war with most of the Allies of World War II.
June 13 » Catalina affair: A Swedish Douglas DC-3 is shot down by a Soviet MiG-15 fighter.
September 1 » The Old Man and the Sea, the Pulitzer Prize-winning novel by Ernest Hemingway, is first published.
October 14 » Korean War: The Battle of Triangle Hill is the biggest and bloodiest battle of 1952.
December 24 » First flight of Britain's Handley Page Victor strategic bomber.
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/I76313.php : accessed February 18, 2026), "Christianus Franciscus Koops (1930-< 2026)".
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