The temperature on April 11, 1939 was between 7.2 °C and 20.2 °C and averaged 13.9 °C. There was 11.3 hours of sunshine (83%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
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.
April 9 » African-American singer Marian Anderson gives a concert at the Lincoln Memorial after being denied the use of Constitution Hall by the Daughters of the American Revolution.
September 18 » World War II: The Polish government of Ignacy Mościcki flees to Romania.
October 1 » World War II: After a one-month siege, German troops occupy Warsaw.
October 14 » World War II: The German submarineU-47 sinks the British battleship HMSRoyal Oak within her harbour at Scapa Flow, Scotland.
November 17 » Nine Czech students are executed as a response to anti-Nazi demonstrations prompted by the death of Jan Opletal. All Czech universities are shut down and more than 1,200 students sent to concentration camps. Since this event, International Students' Day is celebrated in many countries, especially in the Czech Republic.
November 26 » Shelling of Mainila: The Soviet Army orchestrates an incident which is used to justify the start of the Winter War with Finland four days later.
Day of death July 23, 1942
The temperature on July 23, 1942 was between 13.0 °C and 17.4 °C and averaged 15.3 °C. There was 6.1 mm of rain during 3.7 hours. There was 0.6 hours of sunshine (4%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west. Source: KNMI
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 13 » Henry Ford patents a plastic automobile, which is 30% lighter than a regular car.
January 19 » World War II: The Japanese conquest of Burma begins.
April 19 » World War II: In Poland, the Majdan-Tatarski ghetto is established, situated between the Lublin Ghetto and a Majdanek subcamp.
May 12 » World War II: Second Battle of Kharkov: In eastern Ukraine, Red Army forces under Marshal Semyon Timoshenko launch a major offensive from the Izium bridgehead, only to be encircled and destroyed by the troops of Army Group South two weeks later.
November 26 » Casablanca, the movie starring Humphrey Bogart and Ingrid Bergman, premieres in New York City.
December 10 » World War II: Government of Poland in exile send Raczyński's Note (the first official report on the Holocaust) to 26 governments who signed the Declaration by United Nations.
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/I444591.php : accessed January 12, 2026), "Jan Blaak (1939-1942)".
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