The temperature on June 7, 1957 was between 6.1 °C and 18.0 °C and averaged 12.9 °C. There was 0.7 mm of rain during 0.6 hours. There was 3.3 hours of sunshine (20%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
January 5 » In a speech given to the United States Congress, United States President Dwight D. Eisenhower announces the establishment of what will later be called the Eisenhower Doctrine.
April 6 » Greek shipping tycoon Aristotle Onassis buys the Hellenic National Airlines (TAE) and founds Olympic Airlines.
July 25 » The Tunisian King Muhammad VIII al-Amin is replaced by President Habib Bourguiba.
July 26 » Carlos Castillo Armas, dictator of Guatemala, is assassinated.
October 4 » Sputnik 1 becomes the first artificial satellite to orbit the Earth.
December 20 » The initial production version of the Boeing 707 makes its first flight.
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/I10406.php : accessed January 23, 2026), "Helena Petronella Pieters (1873-1957)".
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