The temperature on May 30, 1917 was between 9.6 °C and 19.8 °C and averaged 14.8 °C. There was 8.8 hours of sunshine (54%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
January 19 » Silvertown explosion: A blast at a munitions factory in London kills 73 and injures over 400. The resulting fire causes over £2,000,000 worth of damage.
June 7 » World War I: Battle of Messines: Allied soldiers detonate a series of mines underneath German trenches at Messines Ridge, killing 10,000 German troops.
June 28 » World War I: Greece joins the Allied powers.
October 31 » World War I: Battle of Beersheba: The "last successful cavalry charge in history".
December 6 » Finland declares independence from Soviet Russia.
December 7 » World War I: The United States declares war on Austria-Hungary.
About the surname Petrus Leopoldus Wilhelmus de Caluwe
When copying data from this family tree, please include a reference to the origin: P.M. Baert, "Family tree Baert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-baert/I15840.php : accessed March 13, 2026), "Petrus Leopoldus Wilhelmus de Caluwe".
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