The temperature on September 20, 1957 was between 7.4 °C and 17.1 °C and averaged 12.4 °C. There was 9.2 hours of sunshine (74%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. 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.
February 18 » Kenyan rebel leader Dedan Kimathi is executed by the British colonial government.
February 22 » Ngô Đình Diệm of South Vietnam survives a communist shooting assassination attempt in Buôn Ma Thuột.
April 10 » The Suez Canal is reopened for all shipping after being closed for three months.
April 30 » Supplementary Convention on the Abolition of Slavery entered into force.
July 26 » Carlos Castillo Armas, dictator of Guatemala, is assassinated.
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/I20916.php : accessed January 23, 2026), "William David Dreyer (1957-1957)".
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