The temperature on July 24, 1947 was between 14.9 °C and 26.0 °C and averaged 20.5 °C. There was 0.1 mm of rain. There was 8.9 hours of sunshine (56%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
January 1 » Cold War: The American and British occupation zones in Allied-occupied Germany, after World War II, merge to form the Bizone, which later (with the French zone) became part of West Germany.
February 23 » International Organization for Standardization is founded.
April 30 » In Nevada, Boulder Dam is renamed Hoover Dam.
June 24 » Kenneth Arnold makes the first widely reported UFO sighting near Mount Rainier, Washington, leading to the coining of the phrase "flying saucer".
July 11 » The Exodus 1947 heads to Palestine from France.
November 17 » American scientists John Bardeen and Walter Houser Brattain observe the basic principles of the transistor, a key element for the electronics revolution of the 20th century.
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/I20978.php : accessed March 6, 2026), "Cecilia Susanna Greeff (1947-2022)".
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