The temperature on August 21, 1917 was between 7.6 °C and 21.3 °C and averaged 14.7 °C. There was 11.1 hours of sunshine (77%). The average windspeed was 2 Bft (weak wind) and was prevailing from the 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 22 » World War I: President Woodrow Wilson of the still-neutral United States calls for "peace without victory" in Europe.
March 15 » Tsar Nicholas II of Russia abdicates the Russian throne ending the 304-year Romanov dynasty.
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.
July 25 » Sir Robert Borden introduces the first income tax in Canada as a "temporary" measure (lowest bracket is 4% and highest is 25%).
November 28 » The Estonian Provincial Assembly declares itself the sovereign power of Estonia.
December 7 » World War I: The United States declares war on Austria-Hungary.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I122805.php : accessed January 20, 2026), "Ruurd Span (1917-1978)".
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