April 20 » Pierre and Marie Curie refine radium chloride.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
June 28 » The U.S. Congress passes the Spooner Act, authorizing President Theodore Roosevelt to acquire rights from Colombia for the Panama Canal.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
November 21 » The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
Day of marriage May 4, 1927
The temperature on May 4, 1927 was between 8.7 °C and 24.4 °C and averaged 17.2 °C. There was 10.7 hours of sunshine (71%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
May 4 » The Academy of Motion Picture Arts and Sciences is incorporated.
May 26 » The last Ford Model T rolls off the assembly line after a production run of 15,007,003 vehicles.
June 13 » Aviator Charles Lindbergh receives a ticker tape parade down 5th Avenue in New York City.
June 29 » The Bird of Paradise, a U.S. Army Air Corps Fokker tri-motor, completes the first transpacific flight, from the mainland United States to Hawaii.
July 23 » The first station of the Indian Broadcasting Company goes on the air in Bombay.
August 1 » The Nanchang Uprising marks the first significant battle in the Chinese Civil War between the Kuomintang and Chinese Communist Party. This day is commemorated as the anniversary of the founding of the People's Liberation Army.
Day of death October 21, 1984
The temperature on October 21, 1984 was between 7.0 °C and 13.1 °C and averaged 9.8 °C. There was -0.1 mm of rain. There was 2.5 hours of sunshine (24%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
May 6 » One hundred three Korean Martyrs are canonized by Pope John Paul II in Seoul.
September 18 » Joe Kittinger completes the first solo balloon crossing of the Atlantic.
September 21 » Brunei joins the United Nations.
October 16 » Desmond Tutu is awarded the Nobel Peace Prize.
November 27 » Under the Brussels Agreement signed between the governments of the United Kingdom and Spain, the former agreed to enter into discussions with Spain over Gibraltar, including sovereignty.
December 10 » United Nations General Assembly recognizes the Convention against Torture.
When copying data from this family tree, please include a reference to the origin: Hans Dunning, "Family tree Dunning", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-dunning/R3030.php : accessed February 2, 2026), "Henderika de Boer (1902-1984)".
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