The temperature on April 15, 1911 was between 5.3 °C and 15.2 °C and averaged 9.8 °C. There was 10.7 hours of sunshine (77%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
January 12 » The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
April 27 » Following the resignation and death of William P. Frye, a compromise is reached to rotate the office of President pro tempore of the United States Senate.
June 22 » George V and Mary of Teck are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
September 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
November 1 » World's first combat aerial bombing mission takes place in Libya during the Italo-Turkish War. Second Lieutenant Giulio Gavotti of Italy drops several small bombs.
Day of marriage June 21, 1934
The temperature on June 21, 1934 was between 8.5 °C and 19.1 °C and averaged 14.0 °C. There was 1.7 mm of rain during 0.8 hours. There was 4.2 hours of sunshine (25%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
May 28 » Near Callander, Ontario, Canada, the Dionne quintuplets are born to Oliva and Elzire Dionne; they will be the first quintuplets to survive infancy.
August 19 » The German referendum of 1934 approves Hitler's appointment as head of state with the title of Führer.
September 1 » The first Metro-Goldwyn-Mayer animated cartoon, The Discontented Canary, is released to movie theatres.
September 22 » The Gresford disaster in Wales kills 266 miners and rescuers.
September 26 » The ocean liner RMSQueen Mary is launched.
October 9 » An Ustashe assassin kills King Alexander I of Yugoslavia and Louis Barthou, Foreign Minister of France, in Marseille.
Day of death December 11, 1964
The temperature on December 11, 1964 was between 3.9 °C and 8.0 °C and averaged 6.3 °C. There was 0.5 mm of rain during 0.4 hours. The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the west. Source: KNMI
January 30 » In a bloodless coup, General Nguyễn Khánh overthrows General Dương Văn Minh's military junta in South Vietnam.
April 7 » IBM announces the System/360.
June 21 » Three civil rights workers, Andrew Goodman, James Chaney and Michael Schwerner, are murdered in Neshoba County, Mississippi, United States, by members of the Ku Klux Klan.
July 31 » Ranger program: Ranger 7 sends back the first close-up photographs of the moon, with images 1,000 times clearer than anything ever seen from earth-bound telescopes.
September 4 » Scotland's Forth Road Bridge near Edinburgh officially opens.
September 13 » South Vietnamese Generals Lâm Văn Phát and Dương Văn Đức fail in a coup attempt against General Nguyễn Khánh.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I13285.php : accessed February 12, 2026), "Marinus Johannes Köper (1911-1964)".
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