The temperature on April 30, 1917 was between 2.5 °C and 16.2 °C and averaged 9.6 °C. There was 11.4 hours of sunshine (77%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
February 3 » First World War: The American entry into World War I begins when diplomatic relations with Germany are severed due to its unrestricted submarine warfare.
July 27 » World War I: The Allies reach the Yser Canal at the Battle of Passchendaele.
November 7 » The Gregorian calendar date of the October Revolution, which gets its name from the Julian calendar date of 25 October. On this date in 1917, the Bolsheviks storm the Winter Palace.
November 20 » World War I: Battle of Cambrai begins: British forces make early progress in an attack on German positions but are later pushed back.
November 26 » The Manchester Guardian publishes the 1916 secret Sykes-Picot Agreement between the United Kingdom and France.
November 28 » The Estonian Provincial Assembly declares itself the sovereign power of Estonia.
When copying data from this family tree, please include a reference to the origin: Jacqueline Freriksen-Vijn, "Family tree Vijn", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-vijn/I500046.php : accessed January 15, 2026), "Wilhelmus Albertus Kolnaar (± 1900-1917)".
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