The temperature on April 21, 1913 was between -1.5 °C and 13.6 °C and averaged 8.3 °C. There was 3.9 hours of sunshine (27%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. 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.
February 3 » The Sixteenth Amendment to the United States Constitution is ratified, authorizing the Federal government to impose and collect an income tax.
March 21 » Over 360 are killed and 20,000 homes destroyed in the Great Dayton Flood in Dayton, Ohio.
June 23 » Second Balkan War: The Greeks defeat the Bulgarians in the Battle of Doiran.
July 4 » President Woodrow Wilson addresses American Civil War veterans at the Great Reunion of 1913.
December 1 » The Buenos Aires Metro, the first underground railway system in the Southern Hemisphere and in Latin America, begins operation.
December 17 » A spur of the Shaker Heights streetcar line opens, the first line of the eventual Cleveland RTA Rapid Transit system.
Day of marriage July 31, 1941
The temperature on July 31, 1941 was between 10.0 °C and 19.6 °C and averaged 14.8 °C. There was 4.6 hours of sunshine (30%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
April 28 » The Ustaše massacre nearly 200 Serbs in the village of Gudovac, the first massacre of their genocidal campaign against Serbs of the Independent State of Croatia.
May 1 » World War II: German forces launch a major attack during the siege of Tobruk.
May 24 » World War II: In the Battle of the Atlantic, the German Battleship Bismarck sinks then-pride of the Royal Navy, HMSHood, killing all but three crewmen.
July 13 » World War II: Montenegrins begin a popular uprising against the Axis powers (Trinaestojulski ustanak).
October 9 » A coup in Panama declares Ricardo Adolfo de la Guardia Arango the new president.
November 12 » World War II: Temperatures around Moscow drop to -12°C as the Soviet Union launches ski troops for the first time against the freezing German forces near the city.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I187418.php : accessed December 30, 2025), "Klaas Postma (1913-)".
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