The temperature on March 23, 1957 was between 6.6 °C and 12.6 °C and averaged 9.6 °C. There was 2.8 mm of rain during 2.5 hours. The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
February 18 » Kenyan rebel leader Dedan Kimathi is executed by the British colonial government.
March 8 » Egypt re-opens the Suez Canal after the Suez Crisis.
April 6 » Greek shipping tycoon Aristotle Onassis buys the Hellenic National Airlines (TAE) and founds Olympic Airlines.
August 5 » American Bandstand, a show dedicated to the teenage "baby-boomers" by playing the songs and showing popular dances of the time, debuts on the ABC television network.
September 4 » American Civil Rights Movement: Little Rock Crisis: Orval Faubus, governor of Arkansas, calls out the National Guard to prevent African American students from enrolling in Central High School.
September 22 » In Haiti, François Duvalier is elected president.
When copying data from this family tree, please include a reference to the origin: Robert de Rooij, "Family tree de Rooij", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_de_rooij/I16396.php : accessed January 28, 2026), "Johan Rudolf Planken (1957-2023)".
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