The temperature on March 25, 1947 was between 0.4 °C and 9.9 °C and averaged 4.3 °C. There was 2.6 mm of rain during 3.0 hours. There was 10.0 hours of sunshine (80%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
February 21 » In New York City, Edwin Land demonstrates the first "instant camera", the Polaroid Land Camera, to a meeting of the Optical Society of America.
March 12 » Cold War: The Truman Doctrine is proclaimed to help stem the spread of Communism.
July 19 » Korean politician Lyuh Woon-hyung is assassinated.
July 26 » Cold War: U.S. President Harry S. Truman signs the National Security Act of 1947 into United States law creating the Central Intelligence Agency, United States Department of Defense, United States Air Force, Joint Chiefs of Staff, and the United States National Security Council.
November 13 » The Soviet Union completes development of the AK-47, one of the first proper assault rifles.
December 30 » Cold War: King Michael I of Romania is forced to abdicate by the Soviet Union-backed Communist government of Romania.
Day of death August 13, 1947
The temperature on August 13, 1947 was between 12.3 °C and 24.3 °C and averaged 18.4 °C. There was 11.5 hours of sunshine (77%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. 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 12 » Christian Dior unveils a "New Look", helping Paris regain its position as the capital of the fashion world.
August 7 » Thor Heyerdahl's balsa wood raft, the Kon-Tiki, smashes into the reef at Raroia in the Tuamotu Islands after a 101-day, 7,000 kilometres (4,300mi) journey across the Pacific Ocean in an attempt to prove that pre-historic peoples could have traveled from South America.
October 16 » The Philippines takes over the administration of the Turtle Islands and the Mangsee Islands from the United Kingdom.
November 2 » In California, designer Howard Hughes performs the maiden (and only) flight of the Hughes H-4 Hercules (also known as the "Spruce Goose"), the largest fixed-wing aircraft ever built.
November 13 » The Soviet Union completes development of the AK-47, one of the first proper assault rifles.
When copying data from this family tree, please include a reference to the origin: Wim Ackermans, "Family tree Ackermans", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ackermans/I4741.php : accessed January 31, 2026), "Sonja Proost (1947-1947)".
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