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.
April 24 » The Woolworth Building, a skyscraper in New York City, is opened.
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.
August 13 » First production in the UK of stainless steel by Harry Brearley.
October 14 » Senghenydd colliery disaster, the United Kingdom's worst coal mining accident, claims the lives of 439 miners.
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
July 21 » Spanish Civil War: The Central Committee of Antifascist Militias of Catalonia is constituted, establishing an anarcho-syndicalist economy in Catalonia.
October 5 » The Jarrow March sets off for London.
October 26 » The first electric generator at Hoover Dam goes into full operation.
November 23 » Life magazine is reborn as a photo magazine and enjoys instant success.
December 7 » Australian cricketer Jack Fingleton becomes the first player to score centuries in four consecutive Test innings.
December 11 » Abdication Crisis: Edward VIII's abdication as King of the United Kingdom and the British Dominions beyond the Seas, and Emperor of India, becomes effective.
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
January 22 » The Singapore Declaration, one of the two most important documents to the uncodified constitution of the Commonwealth of Nations, is issued.
February 21 » The Convention on Psychotropic Substances is signed at Vienna.
September 28 » The Parliament of the UK passes the Misuse of Drugs Act 1971, banning the medicinal use of cannabis.
October 28 » Prospero becomes the only British satellite to be launched by a British rocket.
November 30 » Iran seizes the Greater and Lesser Tunbs from the Emirates of Sharjah and Ras Al Khaimah.
December 16 » Bangladesh Liberation War and Indo-Pakistani War of 1971: The ceasefire of the Pakistan Army brings an end to both conflicts. This is commemorated annually as Victory Day in Bangladesh, and as Vijay Diwas in India.
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 October 7, 2026), "Jan Koops (1913-1971)".
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