The temperature on September 10, 1915 was between 5.4 °C and 20.1 °C and averaged 13.6 °C. There was 11.1 hours of sunshine (85%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east. 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 26 » The Rocky Mountain National Park is established by an act of the U.S. Congress.
January 28 » An act of the U.S. Congress creates the United States Coast Guard as a branch of the United States Armed Forces.
March 20 » Albert Einstein publishes his general theory of relativity.
May 6 » Babe Ruth, then a pitcher for the Boston Red Sox, hits his first major league home run.
May 24 » World War I: Italy declares war on Austria-Hungary, joining the conflict on the side of the Allies.
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.
Day of death June 15, 1977
The temperature on June 15, 1977 was between 13.8 °C and 21.4 °C and averaged 16.4 °C. There was 2.5 mm of rain during 1.7 hours. There was 1.5 hours of sunshine (9%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
January 19 » President Gerald Ford pardons Iva Toguri D'Aquino (a.k.a. "Tokyo Rose").
April 11 » London Transport's Silver Jubilee AEC Routemaster buses are launched.
May 9 » Hotel Polen fire: A disastrous fire burns down the Hotel Polen in Amsterdam causing 33 deaths and 21 severe injuries.
August 15 » The Big Ear, a radio telescope operated by Ohio State University as part of the SETI project, receives a radio signal from deep space; the event is named the "Wow! signal" from the notation made by a volunteer on the project.
October 26 » Ali Maow Maalin, the last natural case of smallpox, develops a rash in Somalia. The World Health Organization and the Centers for Disease Control and Prevention consider this date to be the anniversary of the eradication of smallpox, the most spectacular success of vaccination.
December 25 » Israeli Prime Minister Menachem Begin meets in Egypt with its president Anwar Sadat.
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/I112773.php : accessed February 12, 2026), "Ytzen Kootstra (1915-1977)".
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