January 13 » First Italo-Ethiopian War: the war's opening battle, the Battle of Coatit, occurs; it is an Italian victory.
March 15 » Heian Shrine is founded.
April 3 » The trial in the libel case brought by Oscar Wilde begins, eventually resulting in his imprisonment on charges of homosexuality.
May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
October 4 » Horace Rawlins wins the first U.S. Open Men's Golf Championship.
December 28 » Wilhelm Röntgen publishes a paper detailing his discovery of a new type of radiation, which later will be known as x-rays.
Day of marriage May 20, 1921
The temperature on May 20, 1921 was between 5.7 °C and 19.3 °C and averaged 12.7 °C. There was 9.6 hours of sunshine (60%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
March 20 » The Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland.
May 31 » The Tulsa race massacre kills at least 39, but other estimates of black fatalities vary from 55 to about 300.
June 12 » Mikhail Tukhachevsky orders the use of chemical weapons against the Tambov Rebellion, bringing an end to the peasant uprising.
July 29 » Adolf Hitler becomes leader of the National Socialist German Workers Party.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
November 4 » Japanese Prime Minister Hara Takashi is assassinated in Tokyo.
Day of death May 27, 1975
The temperature on May 27, 1975 was between 7.7 °C and 20.3 °C and averaged 14.6 °C. There was 7.4 hours of sunshine (46%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. 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.
March 11 » Vietnam War: North Vietnamese and Viet Cong guerrilla forces establish control over Buôn Ma Thuột commune from the South Vietnamese army.
April 4 » Microsoft is founded as a partnership between Bill Gates and Paul Allen in Albuquerque, New Mexico.
May 30 » European Space Agency is established.
July 15 » Space Race: Apollo–Soyuz Test Project features the dual launch of an Apollo spacecraft and a Soyuz spacecraft on the first joint Soviet-United States human-crewed flight. It was both the last launch of an Apollo spacecraft, and the Saturn family of rockets.
October 16 » The Australian Coalition sparks a constitutional crisis when they vote to defer funding for the government's annual budget.
November 7 » In Bangladesh, a joint force of people and soldiers takes part in an uprising led by Colonel Abu Taher that ousts and kills Brigadier Khaled Mosharraf, freeing the then house-arrested army chief and future president Maj-Gen. Ziaur Rahman.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I32001.php : accessed January 24, 2026), "Ebbiena Zwaantina "Bientje" Koorn (1895-1975)".
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