The temperature on August 6, 1913 was between 4.7 °C and 17.6 °C and averaged 11.3 °C. There was 5.1 hours of sunshine (33%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
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.
May 30 » The Treaty of London is signed, ending the First Balkan War; Albania becomes an independent nation.
July 31 » The Balkan States sign an armistice in Bucharest.
October 14 » Senghenydd colliery disaster, the United Kingdom's worst coal mining accident, claims the lives of 439 miners.
November 9 » The Great Lakes Storm of 1913, the most destructive natural disaster ever to hit the lakes, reaches its greatest intensity after beginning two days earlier. The storm destroys 19 ships and kills more than 250 people.
December 1 » The Buenos Aires Metro, the first underground railway system in the Southern Hemisphere and in Latin America, begins operation.
December 21 » Arthur Wynne's "word-cross", the first crossword puzzle, is published in the New York World.
Day of marriage May 9, 1936
The temperature on May 9, 1936 was between 9.7 °C and 19.5 °C and averaged 14.2 °C. There was 0.1 mm of rain during 0.2 hours. There was 3.6 hours of sunshine (23%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
May 21 » Sada Abe is arrested after wandering the streets of Tokyo for days with her dead lover's severed genitals in her handbag. Her story soon becomes one of Japan's most notorious scandals.
July 23 » In Catalonia, Spain, the Unified Socialist Party of Catalonia is founded through the merger of Socialist and Communist parties.
August 1 » The Olympics opened in Berlin with a ceremony presided over by Adolf Hitler.
August 10 » Spanish Civil War: The Regional Defence Council of Aragon is dissolved by the Spanish Republic.
August 31 » Radio Prague, now the official international broadcasting station of the Czech Republic, goes on the air.
Day of death December 21, 1971
The temperature on December 21, 1971 was between 9.8 °C and 12.2 °C and averaged 11.0 °C. There was 0.1 mm of rain during 0.4 hours. There was 0.1 hours of sunshine (1%). The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
February 9 » Apollo program: Apollo 14 returns to Earth after the third manned Moon landing.
May 31 » In accordance with the Uniform Monday Holiday Act passed by the U.S. Congress in 1968, observation of Memorial Day occurs on the last Monday in May for the first time, rather than on the traditional Memorial Day of May 30.
August 22 » J. Edgar Hoover and John Mitchell announce the arrest of 20 of the Camden 28.
September 13 » Chairman Mao Zedong's second in command and successor Marshal Lin Biao flees the People's Republic of China after the failure of an alleged coup. His plane crashes in Mongolia, killing all aboard.
September 21 » Bahrain, Bhutan and Qatar join the United Nations.
December 7 » Pakistan President Yahya Khan announces the formation of a coalition government with Nurul Amin as Prime Minister and Zulfikar Ali Bhutto as Deputy Prime Minister.
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/I84765.php : accessed December 27, 2025), "Jan Koops (1913-1971)".
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