January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 14 » British forces begin the Battle of the Tugela Heights in an effort to lift the Siege of Ladysmith.
April 5 » Archaeologists in Knossos, Crete, discover a large cache of clay tablets with hieroglyphic writing in a script they call Linear B.
July 19 » The first line of the Paris Métro opens for operation.
July 29 » In Italy, King Umberto I of Italy is assassinated by the anarchist Gaetano Bresci.
November 7 » Second Boer War: Battle of Leliefontein, a battle during which the Royal Canadian Dragoons win three Victoria Crosses.
Day of marriage August 2, 1923
The temperature on August 2, 1923 was between 8.6 °C and 23.3 °C and averaged 17.3 °C. There was 0.1 mm of rain. There was 10.9 hours of sunshine (70%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-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 9 » Lithuanian residents of the Memel Territory rebel against the League of Nations' decision to leave the area as a mandated region under French control.
March 20 » The Arts Club of Chicago hosts the opening of Pablo Picasso's first United States showing, entitled Original Drawings by Pablo Picasso, becoming an early proponent of modern art in the United States.
April 15 » Insulin becomes generally available for use by people with diabetes.
September 13 » Following a military coup in Spain, Miguel Primo de Rivera takes over, setting up a dictatorship.
November 9 » In Munich, Germany, police and government troops crush the Beer Hall Putsch in Bavaria. The failed coup is the work of the Nazis.
November 11 » Adolf Hitler was arrested in Munich for high treason for his role in the Beer Hall Putsch.
Day of death November 22, 1971
The temperature on November 22, 1971 was between 1.0 °C and 4.7 °C and averaged 2.8 °C. There was 8.0 mm of rain during 8.0 hours. The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
February 26 » U.N. Secretary-General U Thant signs United Nations proclamation of the vernal equinox as Earth Day.
July 5 » The Twenty-sixth Amendment to the United States Constitution, lowering the voting age from 21 to 18 years, is formally certified by President Richard Nixon.
September 8 » In Washington, D.C., the John F. Kennedy Center for the Performing Arts is inaugurated, with the opening feature being the premiere of Leonard Bernstein's Mass.
September 28 » The Parliament of the UK passes the Misuse of Drugs Act 1971, banning the medicinal use of cannabis.
November 14 » Mariner 9 enters orbit around Mars.
December 20 » The international aid organization Doctors Without Borders is founded by Bernard Kouchner and a group of journalists in Paris, France.
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/I91510.php : accessed December 29, 2025), "Derk Weening (1900-1971)".
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