The temperature on May 21, 1914 was between 8.8 °C and 22.8 °C and averaged 16.1 °C. There was 9.9 hours of sunshine (62%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
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.
January 1 » The SPT Airboat Line becomes the world's first scheduled airline to use a winged aircraft.
May 17 » The Protocol of Corfu is signed, recognising full autonomy to Northern Epirus under nominal Albanian sovereignty.
June 28 » Archduke Franz Ferdinand of Austria and his wife Sophie are assassinated in Sarajevo; this is the casus belli of World War I.
August 23 » World War I: Japan declares war on Germany.
November 2 » World War I: The Russian Empire declares war on the Ottoman Empire and the Dardanelles are subsequently closed.
November 15 » Harry Turner becomes the first player to die from game-related injuries in the "Ohio League", the direct predecessor to the National Football League.
Day of marriage May 11, 1939
The temperature on May 11, 1939 was between 8.5 °C and 17.3 °C and averaged 11.9 °C. There was 0.2 mm of rain during 0.2 hours. There was 4.8 hours of sunshine (31%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
March 15 » Carpatho-Ukraine declares itself an independent republic, but is annexed by Hungary the next day.
April 30 » The 1939–40 New York World's Fair opens.
June 1 » First flight of the German Focke-Wulf Fw 190 fighter aircraft.
June 12 » The Baseball Hall of Fame opens in Cooperstown, New York.
June 24 » Siam is renamed Thailand by Plaek Phibunsongkhram, the country's third prime minister.
September 28 » World War II: Nazi Germany and the Soviet Union agree on a division of Poland.
Day of death October 17, 1990
The temperature on October 17, 1990 was between 9.8 °C and 16.6 °C and averaged 13.4 °C. There was 6.3 mm of rain during 3.5 hours. The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 10 » Time Warner is formed by the merger of Time Inc. and Warner Communications.
January 12 » A seven-day pogrom breaks out against the Armenian civilian population of Baku, Azerbaijan, during which Armenians were beaten, tortured, murdered, and expelled from the city.
February 14 » The Voyager 1 spacecraft takes the photograph of planet Earth that later become famous as Pale Blue Dot.
March 29 » The Czechoslovak parliament is unable to reach an agreement on what to call the country after the fall of Communism, sparking the so-called Hyphen War.
July 16 » The Parliament of the Ukrainian SSR declares state sovereignty over the territory of the Ukrainian SSR.
November 14 » After German reunification, the Federal Republic of Germany and Poland sign a treaty confirming the Oder–Neisse line as the border between Germany and Poland.
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/I122491.php : accessed October 18, 2026), "Sipke Siersema (1914-1990)".
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