The temperature on February 14, 1915 was between 4.2 °C and 6.4 °C and averaged 5.2 °C. There was 7.4 mm of rain. The average windspeed was 6 Bft (strong wind) and was prevailing from the south. 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 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.
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.
May 22 » Lassen Peak erupts with a powerful force, the only volcano besides Mount St. Helens to erupt in the contiguous U.S. during the 20th century.
July 16 » At Treasure Island on the Delaware River in the United States, the First Order of the Arrow ceremony takes place and the Order of the Arrow is founded to honor American Boy Scouts who best exemplify the Scout Oath and Law.
August 15 » A story in New York World newspaper reveals that the Imperial German government had purchased excess phenol from Thomas Edison that could be used to make explosives for the war effort and diverted it to Bayer for aspirin production.
November 25 » Albert Einstein presents the field equations of general relativity to the Prussian Academy of Sciences.
Day of death May 31, 1985
The temperature on May 31, 1985 was between 7.2 °C and 21.1 °C and averaged 14.6 °C. There was 11.8 hours of sunshine (72%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 1 » The first British mobile phone call is made by Michael Harrison to his father Sir Ernest Harrison, chairman of Vodafone.
February 19 » Iberia Airlines Boeing 727 crashes into Mount Oiz in Spain, killing 148.
April 23 » Coca-Cola changes its formula and releases New Coke. The response is overwhelmingly negative, and the original formula is back on the market in less than three months.
July 17 » Founding of the EUREKA Network by former head of states François Mitterrand (France) and Helmut Kohl (Germany).
August 7 » Takao Doi, Mamoru Mohri and Chiaki Mukai are chosen to be Japan's first astronauts.
September 13 » Super Mario Bros. is released in Japan for the NES, which starts the Super Mario series of platforming games.
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/I143714.php : accessed February 15, 2026), "Sietske Jager (1915-1985)".
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