The temperature on June 28, 1917 was between 11.9 °C and 23.0 °C and averaged 18.3 °C. There was 0.4 mm of rain. There was 7.9 hours of sunshine (47%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. 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.
February 5 » The Congress of the United States passes the Immigration Act of 1917 over President Woodrow Wilson's veto.
April 9 » World War I: The Battle of Arras: The battle begins with Canadian Corps executing a massive assault on Vimy Ridge.
June 11 » King Alexander assumes the throne of Greece after his father, Constantine I, abdicates under pressure from allied armies occupying Athens.
July 20 » World War I: The Corfu Declaration, which leads to the creation of the post-war Kingdom of Yugoslavia, is signed by the Yugoslav Committee and Kingdom of Serbia.
August 28 » Ten Suffragettes are arrested while picketing the White House.
November 5 » Tikhon is elected the Patriarch of Moscow and of the Russian Orthodox Church.
Day of death February 11, 1986
The temperature on February 11, 1986 was between -2.6 °C and 0.7 °C and averaged -1.3 °C. There was 1.3 hours of sunshine (13%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. 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.
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
March 4 » The Soviet Vega 1 begins returning images of Halley's Comet and the first images of its nucleus.
April 27 » The city of Pripyat and surrounding areas are evacuated due to Chernobyl disaster.
July 6 » Davis Phinney becomes the first American cyclist to win a road stage of the Tour de France.
August 21 » Carbon dioxide gas erupts from volcanic Lake Nyos in Cameroon, killing up to 1,800 people within a 20-kilometer range.
August 31 » The Soviet passenger liner Admiral Nakhimov sinks in the Black Sea after colliding with the bulk carrier Pyotr Vasev, killing 423.
December 23 » Voyager, piloted by Dick Rutan and Jeana Yeager, lands at Edwards Air Force Base in California becoming the first aircraft to fly non-stop around the world without aerial or ground refueling.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I3772.php : accessed January 21, 2026), "Jan de Graaf (1917-1986)".
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