The temperature on June 9, 1911 was between 8.5 °C and 17.0 °C and averaged 13.5 °C. There was 3.9 hours of sunshine (23%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
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.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
Day of marriage September 5, 1940
The temperature on September 5, 1940 was between 10.5 °C and 27.4 °C and averaged 18.0 °C. There was 11.2 hours of sunshine (84%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 8 » World War II: Britain introduces food rationing.
May 26 » World War II: The Siege of Calais ends with the surrender of the British and French garrison.
June 10 » World War II: Military resistance to the German occupation of Norway ends.
June 21 » World War II: Italy begins an unsuccessful invasion of France.
August 20 » World War II: British Prime Minister Winston Churchill makes the fourth of his famous wartime speeches, containing the line "Never was so much owed by so many to so few".
September 7 » Romania returns Southern Dobruja to Bulgaria under the Treaty of Craiova.
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/I261122.php : accessed February 22, 2026), "Klasina Roelfina Struik (1911-)".
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