The temperature on June 13, 1957 was between 6.2 °C and 21.4 °C and averaged 14.9 °C. There was 15.6 hours of sunshine (93%). The almost cloudless was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 23 » American inventor Walter Frederick Morrison sells the rights to his flying disc to the Wham-O toy company, which later renames it the "Frisbee".
March 13 » Cuban student revolutionaries storm the presidential palace in Havana in a failed attempt on the life of President Fulgencio Batista.
March 25 » United States Customs seizes copies of Allen Ginsberg's poem "Howl" on obscenity grounds.
July 26 » Carlos Castillo Armas, dictator of Guatemala, is assassinated.
October 10 » The Windscale fire results in Britain's worst nuclear accident.
December 2 » United Nations Security Council Resolution 126 relating to Kashmir conflict is adopted.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I40993.php : accessed February 13, 2026), "Pieter Aardema (1940-1957)".
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