The temperature on June 10, 1921 was between 9.4 °C and 16.2 °C and averaged 12.3 °C. There was 6.3 mm of rain. There was 1.3 hours of sunshine (8%). The average windspeed was 4 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.
January 9 » Greco-Turkish War: The First Battle of İnönü, the first battle of the war, begins near Eskişehir in Anatolia.
March 17 » The Second Polish Republic adopts the March Constitution.
May 3 » West Virginia becomes the first state to legislate a broad sales tax, but does not implement it until a number of years later due to enforcement issues.
June 12 » Mikhail Tukhachevsky orders the use of chemical weapons against the Tambov Rebellion, bringing an end to the peasant uprising.
July 27 » Researchers at the University of Toronto, led by biochemist Frederick Banting, prove that the hormone insulin regulates blood sugar.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
Day of death August 12, 1968
The temperature on August 12, 1968 was between 11.4 °C and 20.6 °C and averaged 16.2 °C. There was 9.1 hours of sunshine (61%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
February 8 » American civil rights movement: The Orangeburg massacre: An attack on black students from South Carolina State University who are protesting racial segregation at the town's only bowling alley, leaves three or four dead in Orangeburg, South Carolina.
February 12 » Phong Nhị and Phong Nhất massacre.
April 4 » A.E.K. Athens B.C. becomes the first Greek team to win the European Basketball Cup.
April 7 » Motor racing world champion Jim Clark is killed in an accident during a Formula Two race at Hockenheim.
July 17 » Abdul Rahman Arif is overthrown and the Ba'ath Party is installed as the governing power in Iraq with Ahmed Hassan al-Bakr as the new Iraqi President.
November 17 » British European Airways introduces the BAC One-Eleven into commercial service.
When copying data from this family tree, please include a reference to the origin: Arjen P Mets, "Family tree Mets", database, Genealogy Online (https://www.genealogieonline.nl/mets-stamboom/I33.php : accessed February 28, 2026), "Jan Groeneveld (1921-1968)".
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