April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
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 » Cadillac Motor Company is founded.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of death July 21, 1957
The temperature on July 21, 1957 was between 9.5 °C and 19.9 °C and averaged 15.2 °C. There was 5.9 hours of sunshine (37%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
January 31 » Eight people (5 total crew from 2 aircraft and 3 on the ground) in Pacoima, California are killed following the mid-air collision between a Douglas DC-7 airliner and a Northrop F-89 Scorpion fighter jet.
March 17 » A plane crash in Cebu, Philippines kills Philippine President Ramon Magsaysay and 24 others.
April 10 » The Suez Canal is reopened for all shipping after being closed for three months.
September 22 » In Haiti, François Duvalier is elected president.
September 29 » The Kyshtym disaster is the third-worst nuclear accident ever recorded.
October 10 » U.S. President Eisenhower apologizes to Ghanaian finance minister Gbedemah after he is refused service in a Delaware restaurant.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I6890.php : accessed January 31, 2026), "Debora Susanna Krynauw (1865-1957)".
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