The temperature on May 20, 1941 was between 3.5 °C and 17.5 °C and averaged 11.3 °C. There was 10.1 hours of sunshine (63%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 10 » World War II: The Greek army captures Kleisoura.
April 6 » World War II: Nazi Germany launches Operation 25 (the invasion of Kingdom of Yugoslavia) and Operation Marita (the invasion of Greece).
June 26 » World War II: Soviet planes bomb Kassa, Hungary (now Košice, Slovakia), giving Hungary the impetus to declare war the next day.
September 3 » The Holocaust: Karl Fritzsch, deputy camp commandant of the Auschwitz concentration camp, experiments with the use of Zyklon B in the gassing of Soviet POWs.
October 20 » World War II: Thousands of civilians in German-occupied Serbia are murdered in the Kragujevac massacre.
December 14 » World War II: Japan signs a treaty of alliance with Thailand.
Day of death April 10, 1992
The temperature on April 10, 1992 was between 2.2 °C and 17.0 °C and averaged 10.3 °C. There was 9.9 hours of sunshine (73%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 6 » President of Georgia Zviad Gamsakhurdia flees the country as a result of the military coup.
January 20 » Air Inter Flight 148, an Airbus A320-111, crashes into a mountain near Strasbourg, France killing 87 of the 96 people on board.
February 29 » First day of Bosnia and Herzegovina independence referendum.
March 17 » Israeli Embassy attack in Buenos Aires: Car bomb attack kills 29 and injures 242.
April 12 » The Euro Disney Resort officially opens with its theme park Euro Disneyland; the resort and its park's name are subsequently changed to Disneyland Paris.
May 9 » Armenian forces capture Shusha, marking a major turning point in the Nagorno-Karabakh War.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I4140.php : accessed February 16, 2026), "Nicolaas Keijsper (1941-1992)".
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