The temperature on June 21, 1913 was between 10.4 °C and 14.4 °C and averaged 12.2 °C. There was 9.0 mm of rain. The average windspeed was 1 Bft (weak wind) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
March 21 » Over 360 are killed and 20,000 homes destroyed in the Great Dayton Flood in Dayton, Ohio.
April 4 » First Balkan War: Greek aviator Emmanouil Argyropoulos becomes the first pilot to die in the Hellenic Air Force when his plane crashes.
June 25 » American Civil War veterans begin arriving at the Great Reunion of 1913.
October 9 » The steamship SSVolturno catches fire in the mid-Atlantic.
December 1 » Crete, having obtained self rule from Turkey after the First Balkan War, is annexed by Greece.
December 21 » Arthur Wynne's "word-cross", the first crossword puzzle, is published in the New York World.
Day of death April 20, 1980
The temperature on April 20, 1980 was between 0.9 °C and 9.1 °C and averaged 5.3 °C. There was 5.9 mm of rain during 3.1 hours. There was 5.4 hours of sunshine (38%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
June 1 » Cable News Network (CNN) begins broadcasting.
July 19 » Opening of the Summer Olympics in Moscow.
September 17 » After weeks of strikes at the Lenin Shipyard in Gdańsk, Poland, the nationwide independent trade union Solidarity is established.
September 17 » Former Nicaraguan President Anastasio Somoza Debayle is killed in Asunción, Paraguay.
October 26 » The Peter Muhlenberg Memorial in Washington, D.C. is dedicated.
November 20 » Lake Peigneur drains into an underlying salt deposit. A misplaced Texaco oil probe had been drilled into the Diamond Crystal Salt Mine, causing water to flow down into the mine, eroding the edges of the hole.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I7299.php : accessed March 15, 2026), "Frederik Olthuis (1913-1980)".
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