February 6 » Spanish–American War: The Treaty of Paris, a peace treaty between the United States and Spain, is ratified by the United States Senate.
February 14 » Voting machines are approved by the U.S. Congress for use in federal elections.
March 6 » Bayer registers "Aspirin" as a trademark.
June 12 » New Richmond tornado: The eighth deadliest tornado in U.S. history kills 117 people and injures around 200.
July 11 » Fiat founded by Giovanni Agnelli in Turin, Italy.
September 13 » Henry Bliss is the first person in the United States to be killed in an automobile accident.
Day of marriage April 21, 1923
The temperature on April 21, 1923 was between 3.5 °C and 15.7 °C and averaged 10.6 °C. There was 1.8 hours of sunshine (13%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. 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 9 » Juan de la Cierva makes the first autogyro flight.
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.
July 1 » The Parliament of Canada suspends all Chinese immigration.
September 4 » Maiden flight of the first U.S. airship, the USSShenandoah.
September 9 » Mustafa Kemal Atatürk, the founder of the Republic of Turkey, founds the Republican People's Party.
October 15 » The German Rentenmark is introduced in Germany to counter hyperinflation in the Weimar Republic.
Day of death May 31, 1970
The temperature on May 31, 1970 was between 10.8 °C and 16.6 °C and averaged 13.9 °C. There was 0.4 mm of rain during 0.6 hours. There was 9.4 hours of sunshine (57%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
May 26 » The Soviet Tupolev Tu-144 becomes the first commercial transport to exceed Mach 2.
July 8 » Richard Nixon delivers a special congressional message enunciating Native American self-determination as official US Indian policy, leading to the Indian Self-Determination and Education Assistance Act of 1975.
August 17 » Venera program: Venera 7 launched. It will later become the first spacecraft to successfully transmit data from the surface of another planet (Venus).
September 1 » Palestinian guerrillas attack the motorcade of King Hussein of Jordan in a failed assassination attempt.
December 23 » The Democratic Republic of the Congo officially becomes a one-party state.
December 23 » The North Tower of the World Trade Center in Manhattan, New York, New York is topped out at 1,368 feet (417m), making it the tallest building in the world.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I548136.php : accessed March 17, 2026), "Wilhelmina Krops (1899-1970)".
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