The temperature on April 1, 1947 was between 3.0 °C and 9.2 °C and averaged 6.4 °C. There was 6.9 mm of rain during 4.3 hours. There was 0.2 hours of sunshine (2%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
January 3 » Proceedings of the U.S. Congress are televised for the first time.
June 5 » Cold War: Marshall Plan: In a speech at Harvard University, the United States Secretary of State George Marshall calls for economic aid to war-torn Europe.
June 25 » The Diary of a Young Girl (better known as The Diary of Anne Frank) is published.
November 17 » The Screen Actors Guild implements an anti-Communist loyalty oath.
November 29 » Partition Plan: The United Nations General Assembly approves a plan for the partition of Palestine.
December 16 » William Shockley, John Bardeen and Walter Brattain build the first practical point-contact transistor.
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/I4019.php : accessed March 8, 2026), "Hendrik Jan Haak (1909-)".
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