The temperature on April 18, 1939 was between 3.3 °C and 10.6 °C and averaged 7.4 °C. There was 0.9 mm of rain during 0.7 hours. There was 6.6 hours of sunshine (47%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the north-northwest. 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 18 » Robert Menzies, who became Australia's longest-serving prime minister, is elected as leader of the United Australia Party after the death of Prime Minister Joseph Lyons.
May 14 » Lina Medina becomes the youngest confirmed mother in medical history at the age of five.
June 1 » First flight of the German Focke-Wulf Fw 190 fighter aircraft.
August 2 » Albert Einstein and Leo Szilard write a letter to Franklin D. Roosevelt, urging him to begin the Manhattan Project to develop a nuclear weapon.
September 28 » World War II: Nazi Germany and the Soviet Union agree on a division of Poland.
December 12 » HMSDuchess sinks after a collision with HMSBarham off the coast of Scotland with the loss of 124 men.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I21297.php : accessed January 21, 2026), "Petrus Johannes Dreyer (1939-2015)".
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