The temperature on July 20, 1915 was between 12.4 °C and 19.2 °C and averaged 15.5 °C. There was 1.7 mm of rain. There was 2.9 hours of sunshine (18%). The average windspeed was 3 Bft (moderate breeze) 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.
April 22 » The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres.
May 6 » Babe Ruth, then a pitcher for the Boston Red Sox, hits his first major league home run.
May 7 » World War I: German submarine U-20 sinks RMS Lusitania, killing 1,198 people, including 128 Americans. Public reaction to the sinking turns many former pro-Germans in the United States against the German Empire.
June 5 » Denmark amends its constitution to allow women's suffrage.
August 4 » World War I: The German 12th Army occupies Warsaw during the Gorlice–Tarnów Offensive and the Great Retreat of 1915.
September 15 » The Empire Picture Theatre (now The New Empire Cinema), the oldest running cinema in mainland Australia, opens in Bowral, New South Wales.
Day of marriage March 22, 1937
The temperature on March 22, 1937 was between 0.4 °C and 5.7 °C and averaged 3.0 °C. There was 11.4 mm of rain during 9.5 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
April 1 » The Royal New Zealand Air Force is formed as an independent service.
April 12 » Sir Frank Whittle ground-tests the first jet engine designed to power an aircraft, at Rugby, England.
May 12 » The Duke and Duchess of York are crowned as King George VI and Queen Elizabeth of the United Kingdom of Great Britain and Northern Ireland in Westminster Abbey.
May 21 » A Soviet station, North Pole-1, becomes the first scientific research settlement to operate on the drift ice of the Arctic Ocean.
August 24 » Spanish Civil War: Sovereign Council of Asturias and León is proclaimed in Gijón.
September 22 » Spanish Civil War: Peña Blanca is taken, ending the Battle of El Mazuco.
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/I200252.php : accessed October 10, 2026), "Hendrik Jongsma (1915-)".
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