January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 27 » Fußball-Club Bayern München is founded.
April 5 » Archaeologists in Knossos, Crete, discover a large cache of clay tablets with hieroglyphic writing in a script they call Linear B.
June 14 » The second German Naval Law calls for the Imperial German Navy to be doubled in size, resulting in an Anglo-German naval arms race.
July 2 » Jean Sibelius' Finlandia receives its première performance in Helsinki with the Helsinki Philharmonic Society conducted by Robert Kajanus.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of death September 9, 1939
The temperature on September 9, 1939 was between 13.3 °C and 25.0 °C and averaged 18.7 °C. There was 7.7 hours of sunshine (59%). The average windspeed was 2 Bft (weak 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.
March 17 » Second Sino-Japanese War: Battle of Nanchang between the Kuomintang and Japan begins.
May 17 » The Columbia Lions and the Princeton Tigers play in the United States' first televised sporting event, a collegiate baseball game in New York City.
July 28 » The Sutton Hoo helmet is discovered.
September 3 » World War II: France, the United Kingdom, New Zealand and Australia declare war on Germany after the invasion of Poland, forming the Allies.
September 17 » World War II: The Soviet invasion of Poland begins.
September 28 » World War II: The siege of Warsaw comes to an end.
When copying data from this family tree, please include a reference to the origin: F. van Dijk, "Family tree Van Dijk", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_van_dijk/R21084.php : accessed January 19, 2026), "Wilhelmina Johanna van Gorkom (1900-1939)".
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