January 28 » The Carnegie Institution of Washington is founded in Washington, D.C. with a $10 million gift from Andrew Carnegie.
May 20 » Cuba gains independence from the United States. Tomás Estrada Palma becomes the country's first President.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
November 29 » The Pittsburgh Stars defeated the Philadelphia Athletics, 11–0 to win the first championship associated with an American national professional football league.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
Day of death December 21, 1974
The temperature on December 21, 1974 was between 7.1 °C and 9.9 °C and averaged 8.6 °C. There was 1.9 hours of sunshine (25%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
February 4 » The Symbionese Liberation Army kidnaps Patty Hearst in Berkeley, California.
March 4 » People magazine is published for the first time in the United States as People Weekly.
April 8 » At Atlanta–Fulton County Stadium, Hank Aaron hits his 715th career home run to surpass Babe Ruth's 39-year-old record.
June 27 » U.S. president Richard Nixon visits the Soviet Union.
November 24 » Donald Johanson and Tom Gray discover the 40% complete Australopithecus afarensis skeleton, nicknamed "Lucy" (after The Beatles song "Lucy in the Sky with Diamonds"), in the Awash Valley of Ethiopia's Afar Depression.
December 22 » The house of former British Prime Minister Edward Heath is attacked by members of the Provisional IRA.
When copying data from this family tree, please include a reference to the origin: Bernard Vermeersch, "Family tree familie Leys", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-leys/I600.php : accessed February 16, 2026), "Marie Augusta T'HOOFT (1902-1974)".
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