March 2 » United States Steel Corporation is founded as a result of a merger between Carnegie Steel Company and Federal Steel Company which became the first corporation in the world with a market capital over $1 billion.
June 17 » The College Board introduces its first standardized test, the forerunner to the SAT.
August 10 » The U.S. Steel recognition strike by the Amalgamated Association of Iron and Steel Workers begins.
October 29 » Leon Czolgosz, the assassin of U.S. President William McKinley, is executed by electrocution.
November 27 » The U.S. Army War College is established.
Day of marriage May 17, 1923
The temperature on May 17, 1923 was between 3.0 °C and 10.3 °C and averaged 6.0 °C. There was 8.6 mm of rain. There was 5.4 hours of sunshine (34%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 11 » Occupation of the Ruhr: Troops from France and Belgium occupy the Ruhr area to force Germany to make its World War I reparation payments.
February 15 » Greece becomes the last European country to adopt the Gregorian calendar.
March 3 » TIME magazine is published for the first time.
April 18 » Yankee Stadium: "The House that Ruth Built" opens.
June 18 » Checker Taxi puts its first taxi on the streets.
September 29 » The First American Track & Field championships for women are held.
Day of death April 6, 1991
The temperature on April 6, 1991 was between 4.5 °C and 14.1 °C and averaged 9.4 °C. There was 0.6 mm of rain during 0.3 hours. There was 6.5 hours of sunshine (49%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
February 27 » Gulf War: U.S. President George H. W. Bush announces that "Kuwait is liberated".
February 28 » The first Gulf War ends.
April 10 » A rare tropical storm develops in the South Atlantic Ocean near Angola; the first to be documented by satellites.
April 29 » The 7.0 Mw Racha earthquake affects Georgia with a maximum MSK intensity of IX (Destructive), killing 270 people.
June 26 » Yugoslav Wars: The Yugoslav People's Army begins the Ten-Day War in Slovenia.
October 17 » 1991 Rudrapur bombings by Sikh separatists, who exploded two bombs, during a Ramlila Hindu celebration in Rudrapur, Uttarakhand, killing 41 people.
When copying data from this family tree, please include a reference to the origin: Tjitze Koster, "Family tree Koster Twijslerheide e.o.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koster/I6604.php : accessed March 10, 2026), "Aaltje Elzinga (1901-1991)".
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