The temperature on June 21, 1940 was between 8.5 °C and 19.3 °C and averaged 15.0 °C. There was 4.6 hours of sunshine (27%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
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.
May 28 » World War II: Belgium surrenders to Nazi Germany to end the Battle of Belgium.
June 7 » King Haakon VII, Crown Prince Olav and the Norwegian government leave Tromsø and go into exile in London. They return exactly five years later.
June 16 » World War II: Marshal Henri Philippe Pétain becomes Chief of State of Vichy France (Chef de l'État Français).
June 18 » Appeal of 18 June by Charles de Gaulle.
August 5 » World War II: The Soviet Union formally annexes Latvia.
December 9 » World War II: Operation Compass: British and Indian troops under the command of Major-General Richard O'Connor attack Italian forces near Sidi Barrani in Egypt.
When copying data from this family tree, please include a reference to the origin: Marian Willems, "Ancestors Kooistra", database, Genealogy Online (https://www.genealogieonline.nl/kooistra-stamboom/I1069.php : accessed February 13, 2026), "Jan de Vries (1904-1940)".
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