The temperature on April 23, 1915 was between 0.1 °C and 11.3 °C and averaged 6.5 °C. There was 9.0 hours of sunshine (63%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
January 17 » Russia defeats Ottoman Turkey in the Battle of Sarikamish during the Caucasus Campaign of World War I.
April 18 » French pilot Roland Garros is shot down and glides to a landing on the German side of the lines during World War I.
May 7 » World War I: German submarine U-20 sinks RMS Lusitania, killing 1,198 people, including 128 Americans. Public reaction to the sinking turns many former pro-Germans in the United States against the German Empire.
June 21 » The U.S. Supreme Court hands down its decision in Guinn v. United States 238 US 347 1915, striking down Oklahoma grandfather clause legislation which had the effect of denying the right to vote to blacks.
July 7 » Colombo Town Guard officer Henry Pedris is executed in British Ceylon for allegedly inciting persecution of Muslims.
September 30 » World War I: Radoje Ljutovac becomes the first soldier in history to shoot down an enemy aircraft with ground-to-air fire.
Day of death January 31, 1974
The temperature on January 31, 1974 was between 2.7 °C and 9.3 °C and averaged 6.0 °C. There was 0.7 mm of rain during 1.0 hours. There was 2.5 hours of sunshine (28%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
April 25 » Carnation Revolution: A leftist military coup in Portugal overthrows the authoritarian-conservative Estado Novo regime and establishes a democratic government.
May 9 » Watergate scandal: The United States House Committee on the Judiciary opens formal and public impeachment hearings against President Richard Nixon.
May 28 » Northern Ireland's power-sharing Sunningdale Agreement collapses following a general strike by loyalists.
June 27 » U.S. president Richard Nixon visits the Soviet Union.
October 19 » Niue becomes a self-governing colony of New Zealand.
November 16 » The Arecibo message is broadcast from the Arecibo Radio Telescope in Puerto Rico. It was aimed at the current location of the globular star cluster Messier 13 some 25,000 light years away. The message will reach empty space by the time it finally arrives since the cluster will have changed position.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I208030.php : accessed October 19, 2026), "Gerhardus Couperus (1915-1974)".
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