The temperature on May 24, 1915 was between 9.6 °C and 22.8 °C and averaged 16.6 °C. There was 14.2 hours of sunshine (88%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. 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 13 » The 6.7 Mw Avezzano earthquake shakes the Province of L'Aquila in Italy with a maximum Mercalli intensity of XI (Extreme), killing between 29,978–32,610.
January 22 » Over 600 people are killed in Guadalajara, Mexico, when a train plunges off the tracks into a deep canyon.
January 28 » An act of the U.S. Congress creates the United States Coast Guard as a branch of the United States Armed Forces.
February 22 » World War I: The Imperial German Navy institutes unrestricted submarine warfare.
March 26 » The Vancouver Millionaires win the 1915 Stanley Cup Finals, the first championship played between the Pacific Coast Hockey Association and the National Hockey Association.
May 9 » World War I: Second Battle of Artois between German and French forces.
Day of marriage May 23, 1936
The temperature on May 23, 1936 was between 2.1 °C and 16.7 °C and averaged 10.3 °C. There was 8.0 hours of sunshine (50%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
April 15 » First day of the Arab revolt in Mandatory Palestine.
June 15 » First flight of the Vickers Wellington bomber.
July 17 » Spanish Civil War: An Armed Forces rebellion against the recently elected leftist Popular Front government of Spain starts the civil war.
July 19 » Spanish Civil War: The CNT and UGT call a general strike in Spain - mobilizing workers' militias against the Nationalist forces.
July 21 » Spanish Civil War: The Central Committee of Antifascist Militias of Catalonia is constituted, establishing an anarcho-syndicalist economy in Catalonia.
November 25 » In Berlin, Germany and Japan sign the Anti-Comintern Pact, agreeing to consult on measures "to safeguard their common interests" in the case of an unprovoked attack by the Soviet Union against either nation. The pact is renewed on the same day five years later with additional signatories.
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/I137529.php : accessed October 17, 2026), "Douwe Sietsma (1915-)".
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