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.
January 5 » First Balkan War: The Battle of Lemnos begins; Greek admiral Pavlos Kountouriotis forces the Turkish fleet to retreat to its base within the Dardanelles, from which it did not venture for the rest of the war.
March 4 » The United States Department of Labor is formed.
July 12 » Serbian forces begin their siege of the Bulgarian city of Vidin; the siege is later called off when the war ends.
October 9 » The steamship SSVolturno catches fire in the mid-Atlantic.
October 31 » The Indianapolis Streetcar Strike and subsequent riot begins.
December 14 » Haruna, the fourth and last Kongō-class ship, launches, eventually becoming one of the Japanese workhorses during World War I and World War II.
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 28 » Alan Turing submits On Computable Numbers for publication.
July 6 » A major breach of the Manchester Bolton & Bury Canal in England sends millions of gallons of water cascading 200 feet (61m) into the River Irwell.
July 23 » In Catalonia, Spain, the Unified Socialist Party of Catalonia is founded through the merger of Socialist and Communist parties.
August 4 » Prime Minister of Greece Ioannis Metaxas suspends parliament and the Constitution and establishes the 4th of August Regime.
December 5 » The Soviet Union adopts a new constitution and the Kirghiz Soviet Socialist Republic is established as a full Union Republic of the USSR.
December 10 » Abdication Crisis: Edward VIII signs the Instrument of Abdication.
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 24 » The All India Forward Bloc holds an emergency central committee meeting after its chairman, Hemantha Kumar Bose, is killed three days earlier. P.K. Mookiah Thevar is appointed as the new chairman.
June 11 » The U.S. Government forcibly removes the last holdouts to the Native American Occupation of Alcatraz, ending 19 months of control.
August 18 » Vietnam War: Australia and New Zealand decide to withdraw their troops from Vietnam.
September 21 » Bahrain, Bhutan and Qatar join the United Nations.
December 7 » The Battle of Sylhet is fought between the Pakistani military and the Mukti Bahini.
December 8 » Indo-Pakistani War: The Indian Navy launches an attack on West Pakistan's port city of Karachi.
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 February 10, 2026), "Jan Koops (1913-1971)".
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