The temperature on April 9, 1957 was between 5.1 °C and 10.0 °C and averaged 7.0 °C. There was 4.7 hours of sunshine (35%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. 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.
February 22 » Ngô Đình Diệm of South Vietnam survives a communist shooting assassination attempt in Buôn Ma Thuột.
June 21 » Ellen Fairclough is sworn in as Canada's first female Cabinet Minister.
July 28 » Heavy rain and a mudslide in Isahaya, western Kyushu, Japan, kills 992.
November 7 » Cold War: The Gaither Report calls for more American missiles and fallout shelters.
November 8 » Pan Am Flight 7 disappears between San Francisco and Honolulu. Wreckage and bodies are discovered a week later.
When copying data from this family tree, please include a reference to the origin: W. Rovers, "Family tree Ro(o)vers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_rovers/I39848.php : accessed January 24, 2026), "NN Roovers".
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