March 1 » Henri Becquerel discovers radioactive decay.
April 6 » In Athens, the opening of the first modern Olympic Games is celebrated, 1,500 years after the original games are banned by Roman emperor Theodosius I.
July 28 » The city of Miami, Florida is incorporated.
September 21 » Anglo-Egyptian conquest of Sudan: British forces under the command of Horatio Kitchener take Dongola.
November 17 » The Western Pennsylvania Hockey League, which later became the first ice hockey league to openly trade and hire players, began play at Pittsburgh's Schenley Park Casino.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
Day of marriage March 6, 1915
The temperature on March 6, 1915 was between 4.9 °C and 10.0 °C and averaged 7.8 °C. There was 3.2 mm of rain. There was -0.1 hours of sunshine (0%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west-northwest. 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 18 » Japan issues the "Twenty-One Demands" to the Republic of China in a bid to increase its power in East Asia.
January 31 » World War I: Germany is the first to make large-scale use of poison gas in warfare in the Battle of Bolimów against Russia.
March 20 » Albert Einstein publishes his general theory of relativity.
March 27 » Typhoid Mary, the first healthy carrier of disease ever identified in the United States is put in quarantine for the second time, where she would remain for the rest of her life.
May 23 » World War I: Italy joins the Allies, fulfilling its part of the Treaty of London.
June 29 » The North Saskatchewan River flood of 1915 is the worst flood in Edmonton history.
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/I154952.php : accessed January 1, 2026), "Rinske Kooistra (1896-????)".
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