The temperature on August 30, 1921 was between 5.4 °C and 17.5 °C and averaged 12.3 °C. There was 4.3 mm of rain. There was 8.5 hours of sunshine (62%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. 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.
February 15 » Kingdom of Romania establishes its legation in Helsinki.
February 21 » Rezā Shāh takes control of Tehran during a successful coup.
March 6 » Portuguese Communist Party is founded as the Portuguese Section of the Communist International.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
October 13 » Soviet republics sign the Treaty of Kars to formalize the borders between Turkey and the South Caucasus states.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
Day of marriage July 11, 1947
The temperature on July 11, 1947 was between 12.2 °C and 17.2 °C and averaged 14.0 °C. There was 16.4 mm of rain during 5.7 hours. There was 0.8 hours of sunshine (5%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 1 » The Canadian Citizenship Act 1946 comes into effect, converting British subjects into Canadian citizens. Prime Minister William Lyon Mackenzie King becomes the first Canadian citizen.
February 21 » In New York City, Edwin Land demonstrates the first "instant camera", the Polaroid Land Camera, to a meeting of the Optical Society of America.
March 17 » First flight of the B-45 Tornado strategic bomber.
April 9 » The Glazier–Higgins–Woodward tornadoes kill 181 and injure 970 in Texas, Oklahoma, and Kansas.
May 1 » Portella della Ginestra massacre against May Day celebrations in Sicily by the bandit and separatist leader Salvatore Giuliano where 11 persons are killed and 33 wounded.
May 22 » Cold War: The Truman Doctrine goes into effect, aiding Turkey and Greece.
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/I6629.php : accessed January 18, 2026), "Roelof Kuiper (1921-< 2020)".
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