The temperature on February 15, 1930 was between -0.4 °C and 5.3 °C and averaged 2.6 °C. There was 2.9 mm of rain during 2.6 hours. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 18 » Elm Farm Ollie becomes the first cow to fly in a fixed-wing aircraft and also the first cow to be milked in an aircraft.
March 6 » International Unemployment Day demonstrations globally initiated by the Comintern.
March 12 » Mahatma Gandhi begins the Salt March, a 200-mile march to the sea to protest the British monopoly on salt in India.
July 7 » Industrialist Henry J. Kaiser begins construction of Boulder Dam (now known as Hoover Dam).
August 7 » The last confirmed lynching of blacks in the Northern United States occurs in Marion, Indiana; two men, Thomas Shipp and Abram Smith, are killed.
November 11 » Patent number US1781541 is awarded to Albert Einstein and Leó Szilárd for their invention, the Einstein refrigerator.
Day of marriage December 21, 1955
The temperature on December 21, 1955 was between -0.6 °C and 5.5 °C and averaged 2.7 °C. There was 1.4 mm of rain during 2.0 hours. The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
February 8 » The Government of Sindh, Pakistan, abolishes the Jagirdari system in the province. One million acres (4000km) of land thus acquired is to be distributed among the landless peasants.
February 18 » Operation Teapot: Teapot test shot "Wasp" is successfully detonated at the Nevada Test Site with a yield of 1.2 kilotons. Wasp is the first of fourteen shots in the Teapot series.
May 9 » Cold War: West Germany joins NATO.
June 11 » Eighty-three spectators are killed and at least 100 are injured after an Austin-Healey and a Mercedes-Benz collide at the 24 Hours of Le Mans, the deadliest ever accident in motorsports.
November 15 » The first part of Saint Petersburg Metro is opened.
November 19 » National Review publishes its first issue.
When copying data from this family tree, please include a reference to the origin: Gert Pieters, "Family tree Koops", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koops/I183.php : accessed January 10, 2026), "Geesje "Ge" Koops (1930-2023)".
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