February 4 » The Philippine–American War begins with the Battle of Manila.
February 16 » Iceland's first football club, Knattspyrnufélag Reykjavíkur, is founded.
March 31 » Malolos, capital of the First Philippine Republic, is captured by American forces.
July 26 » Ulises Heureaux, the 27th President of the Dominican Republic, is assassinated.
December 11 » Second Boer War: In the Battle of Magersfontein the Boers commanded by general Piet Cronjé inflict a defeat on the forces of the British Empire commanded by Lord Methuen trying to relieve the Siege of Kimberley.
Day of marriage August 27, 1920
The temperature on August 27, 1920 was between 7.7 °C and 18.8 °C and averaged 13.4 °C. There was 6.9 hours of sunshine (49%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 19 » The American Civil Liberties Union (ACLU) is founded.
March 13 » The Kapp Putsch briefly ousts the Weimar Republic government from Berlin.
May 7 » Kiev Offensive: Polish troops led by Józef Piłsudski and Edward Rydz-Śmigły and assisted by a symbolic Ukrainian force capture Kiev only to be driven out by the Red Army counter-offensive a month later.
June 15 » Following the 1920 Schleswig plebiscites, Northern Schleswig is transferred from Germany to Denmark.
August 19 » The Tambov Rebellion breaks out, in response to the Bolshevik policy of Prodrazvyorstka.
August 20 » The first commercial radio station, 8MK (now WWJ), begins operations in Detroit.
Day of death August 7, 1978
The temperature on August 7, 1978 was between 11.3 °C and 18.2 °C and averaged 14.7 °C. There was 0.6 mm of rain during 0.5 hours. There was 3.7 hours of sunshine (24%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
March 11 » Coastal Road massacre: At least 37 are killed and more than 70 are wounded when Fatah hijack an Israeli bus, prompting Israel's Operation Litani.
May 1 » Japan's Naomi Uemura, travelling by dog sled, becomes the first person to reach the North Pole alone.
June 1 » The first international applications under the Patent Cooperation Treaty are filed.
June 11 » Altaf Hussain founds the student political movement All Pakistan Muhajir Students Organisation (APMSO) in Karachi University.
June 28 » The United States Supreme Court, in Regents of the University of California v. Bakke bars quota systems in college admissions.
October 1 » Tuvalu gains independence from the United Kingdom.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I18754.php : accessed February 20, 2026), "Hendrikus Cornelis Adrianus van Opstal (1899-1978)".
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