The temperature on September 1, 1961 was between 16.4 °C and 25.0 °C and averaged 18.8 °C. There was 6.1 hours of sunshine (45%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
April 12 » Cold War: Space Race: The Soviet cosmonaut Yuri Gagarin becomes the first human to travel into outer space and perform the first manned orbital flight, Vostok 1.
May 16 » Park Chung-hee leads a coup d'état to overthrow the Second Republic of South Korea.
May 31 » The South African Constitution of 1961 becomes effective, thus creating the Republic of South Africa, which remains outside the Commonwealth of Nations until 1 June 1994, when South Africa is returned to Commonwealth membership.
August 10 » Vietnam War: The U.S. Army begins Operation Ranch Hand, spraying an estimated 20million US gallons (76,000m) of defoliants and herbicides over rural areas of South Vietnam in an attempt to deprive the Viet Cong of food and vegetation cover.
August 15 » Border guard Conrad Schumann flees from East Germany while on duty guarding the construction of the Berlin Wall.
September 17 » The world's first retractable roof stadium, the Civic Arena, opens in Pittsburgh, Pennsylvania.
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/I7934.php : accessed January 6, 2026), "Thomas Frederick Dreyer b5c1d6e5f6g2h1 (1905-1961)".
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