April 20 » Pierre and Marie Curie refine radium chloride.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
August 22 » Cadillac Motor Company is founded.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
Day of marriage April 23, 1958
The temperature on April 23, 1958 was between 1.5 °C and 14.4 °C and averaged 8.4 °C. There was 11.8 hours of sunshine (82%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 23 » After a general uprising and rioting in the streets, President Marcos Pérez Jiménez leaves Venezuela.
February 3 » Founding of the Benelux Economic Union, creating a testing ground for a later European Economic Community.
March 26 » The United States Army launches Explorer 3.
May 28 » Cuban Revolution: Fidel Castro's 26th of July Movement, heavily reinforced by Frank Pais Militia, overwhelm an army post in El Uvero.
September 2 » United States Air Force C-130A-II is shot down by fighters over Yerevan in Armenia when it strays into Soviet airspace while conducting a sigint mission. All crew members are killed.
October 7 » The U.S. manned space-flight project is renamed Project Mercury.
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/I102335.php : accessed October 20, 2026), "Keimpina Veenstra (1902-)".
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