The temperature on September 3, 1912 was between 5.1 °C and 18.4 °C and averaged 12.4 °C. There was 7.9 hours of sunshine (58%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
February 14 » Arizona is admitted as the 48th and the last contiguous U.S. state.
April 17 » Russian troops open fire on striking goldfield workers in northeast Siberia, killing at least 150.
August 14 » U.S. Marines invade Nicaragua to support the U.S.-backed government installed there after José Santos Zelaya had resigned three years earlier.
October 17 » Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
November 27 » Spain declares a protectorate over the north shore of Morocco.
November 28 » Albania declares its independence from the Ottoman Empire.
Day of marriage May 21, 1952
The temperature on May 21, 1952 was between 3.3 °C and 17.3 °C and averaged 11.6 °C. There was 12.2 hours of sunshine (76%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
March 21 » Alan Freed presents the Moondog Coronation Ball, the first rock and roll concert, in Cleveland, Ohio.
May 3 » The Kentucky Derby is televised nationally for the first time, on the CBS network.
October 3 » The United Kingdom successfully tests a nuclear weapon to become the world's third nuclear power.
October 8 » The Harrow and Wealdstone rail crash kills 112 people.
October 14 » Korean War: The Battle of Triangle Hill is the biggest and bloodiest battle of 1952.
November 1 » Nuclear weapons testing: The United States successfully detonates Ivy Mike, the first thermonuclear device, at the Eniwetok atoll. The explosion had a yield of ten megatons TNT equivalent.
Day of death January 12, 1967
The temperature on January 12, 1967 was between 1.4 °C and 5.0 °C and averaged 3.7 °C. There was 1.8 mm of rain during 1.5 hours. The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
January 27 » Cold War: The Soviet Union, the United States, and the United Kingdom sign the Outer Space Treaty in Washington, D.C., banning deployment of nuclear weapons in space, and limiting use of the Moon and other celestial bodies to peaceful purposes.
March 12 » Suharto takes power from Sukarno when the People's Consultative Assembly inaugurate him as Acting President of Indonesia.
April 9 » The first Boeing 737 (a 100 series) makes its maiden flight.
May 10 » The Northrop M2-F2 crashes on landing, becoming the inspiration for the novel Cyborg and TV series The Six Million Dollar Man.
July 1 » Merger Treaty: The European Community is formally created out of a merger with the Common Market, the European Coal and Steel Community, and the European Atomic Energy Commission.
December 3 » At Groote Schuur Hospital in Cape Town, South Africa, a transplant team headed by Christiaan Barnard carries out the first heart transplant on a human (53-year-old Louis Washkansky).
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I548746.php : accessed March 5, 2026), "Harm Pol (1912-1967)".
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