The temperature on February 17, 1917 was between -1.1 °C and 6.6 °C and averaged 3.5 °C. There was 0.1 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. 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 17 » The United States pays Denmark $25 million for the Virgin Islands.
July 31 » World War I: The Battle of Passchendaele begins near Ypres in West Flanders, Belgium.
October 4 » World War I: The Battle of Broodseinde is fought between the British and German armies in Flanders.
October 15 » World War I: Dutch dancer Mata Hari is executed by France for espionage.
November 26 » The National Hockey League is formed, with the Montreal Canadiens, Montreal Wanderers, Ottawa Senators, Quebec Bulldogs, and Toronto Arenas as its first teams.
December 20 » Cheka, the first Soviet secret police force, is founded.
Day of death June 17, 1983
The temperature on June 17, 1983 was between 4.3 °C and 16.6 °C and averaged 11.6 °C. There was -0.1 mm of rain. There was 14.2 hours of sunshine (85%). The partly 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 Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 1 » The ARPANET officially changes to using TCP/IP, the Internet Protocol, effectively creating the Internet.
January 27 » The pilot shaft of the Seikan Tunnel, the world's longest sub-aqueous tunnel (53.85km) between the Japanese islands of Honshū and Hokkaidō, breaks through.
February 8 » The Melbourne dust storm hits Australia's second largest city. The result of the worst drought on record and a day of severe weather conditions, a 320 metres (1,050ft) deep dust cloud envelops the city, turning day to night.
April 18 » A suicide bomber in Lebanon destroys the United States embassy in Beirut, killing 63 people.
July 16 » Sikorsky S-61 disaster: A helicopter crashes off the Isles of Scilly, causing 20 fatalities.
October 22 » Two correctional officers are killed by inmates at the United States Penitentiary in Marion, Illinois. The incident inspires the Supermax model of prisons.
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/I130480.php : accessed February 16, 2026), "Arjen Koopman (1917-1983)".
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