The temperature on June 21, 1915 was between 3.9 °C and 21.2 °C and averaged 14.4 °C. There was 14.0 hours of sunshine (84%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-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.
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.
April 18 » French pilot Roland Garros is shot down and glides to a landing on the German side of the lines during World War I.
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.
July 24 » The passenger ship SSEastland capsizes while tied to a dock in the Chicago River. A total of 844 passengers and crew are killed in the largest loss of life disaster from a single shipwreck on the Great Lakes.
August 27 » Attempted assassination of Bishop Patrick Heffron, bishop of the Diocese of Winona by Rev. Louis M. Lesches.
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 October 7, 1936
The temperature on October 7, 1936 was between 1.5 °C and 10.7 °C and averaged 5.5 °C. There was 0.5 hours of sunshine (4%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
April 27 » The United Auto Workers (UAW) gains autonomy from the American Federation of Labor.
July 11 » The Triborough Bridge in New York City is opened to traffic.
July 23 » In Catalonia, Spain, the Unified Socialist Party of Catalonia is founded through the merger of Socialist and Communist parties.
October 27 » Mrs Wallis Simpson obtains her divorce, which would eventually allow her to marry King Edward VIII of the United Kingdom, thus forcing his abdication from the throne.
November 3 » Franklin D. Roosevelt is re-elected President of the United States.
December 23 » Spanish Civil War: The Spanish Republic legalizes the Regional Defence Council of Aragon.
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I3492.php : accessed March 7, 2026), "Johannes Josephus Siepkes (1915-)".
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