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 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".
April 24 » Suez Crisis: The Suez Canal is reopened following the introduction of UNEF peacekeepers to the region.
September 25 » Central High School in Little Rock, Arkansas, is integrated by the use of United States Army troops.
October 14 » At least 81 people are killed in the most devastating flood in the history of the Spanish city of Valencia.
November 8 » Pan Am Flight 7 disappears between San Francisco and Honolulu. Wreckage and bodies are discovered a week later.
December 17 » The United States successfully launches the first Atlas intercontinental ballistic missile at Cape Canaveral, Florida.
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 26, 2026), "Helena Petronella Pieters (1873-1957)".
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