The temperature on December 19, 1963 was between -8.6 °C and 2.6 °C and averaged -1.8 °C. There was 1.1 mm of rain during 1.0 hours. There was 5.5 hours of sunshine (71%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the west. Source: KNMI
April 12 » The Soviet nuclear-powered submarine K-33 collides with the Finnish merchant vessel M/S Finnclipper in the Danish straits.
May 30 » A protest against pro-Catholic discrimination during the Buddhist crisis is held outside South Vietnam's National Assembly, the first open demonstration during the eight-year rule of Ngo Dinh Diem.
June 17 » The United States Supreme Court rules 8–1 in Abington School District v. Schempp against requiring the reciting of Bible verses and the Lord's Prayer in public schools.
July 1 » ZIP codes are introduced for United States mail.
July 26 » Syncom 2, the world's first geosynchronous satellite, is launched from Cape Canaveral on a Delta B booster.
August 5 » Cold War: The United States, the United Kingdom, and the Soviet Union sign the Partial Nuclear Test Ban Treaty.
When copying data from this family tree, please include a reference to the origin: Rebecca Gibson, "Hamerslag Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/hamerslag-family-tree/P14.php : accessed May 13, 2025), "Henry James Hamerslag (1889-1963)".
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