The temperature on April 1, 1911 was between 0.7 °C and 14.2 °C and averaged 6.6 °C. There was 5.6 hours of sunshine (43%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
September 29 » Italy declares war on the Ottoman Empire.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
Day of marriage January 23, 1935
The temperature on January 23, 1935 was between 5.1 °C and 7.1 °C and averaged 6.2 °C. There was 0.2 mm of rain during 0.3 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
March 23 » Signing of the Constitution of the Commonwealth of the Philippines.
June 3 » One thousand unemployed Canadian workers board freight cars in Vancouver, beginning a protest trek to Ottawa.
June 12 » A ceasefire is negotiated between Bolivia and Paraguay, ending the Chaco War.
June 25 » Colombia–Soviet Union relations are established.
August 15 » Will Rogers and Wiley Post are killed after their aircraft develops engine problems during takeoff in Barrow, Alaska.
September 3 » Sir Malcolm Campbell reaches a speed of 304.331 miles per hour on the Bonneville Salt Flats in Utah, becoming the first person to drive an automobile over 300mph.
Day of death January 13, 1985
The temperature on January 13, 1985 was between -11.2 °C and -6.0 °C and averaged -8.8 °C. There was 4.5 hours of sunshine (55%). The almost cloudless was. The average windspeed was 2 Bft (weak wind) and was prevailing from the 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.
February 28 » The Provisional Irish Republican Army carries out a mortar attack on the Royal Ulster Constabulary police station at Newry, killing nine officers in the highest loss of life for the RUC on a single day.
July 10 » An Aeroflot Tupolev Tu-154 stalls and crashes near Uchkuduk, Uzbekistan (then part of the Soviet Union), killing all 200 people on board in the USSR's worst-ever airline disaster.
July 13 » The Live Aid benefit concert takes place in London and Philadelphia, as well as other venues such as Moscow and Sydney.
September 13 » Super Mario Bros. is released in Japan for the NES, which starts the Super Mario series of platforming games.
October 1 » Israel-Palestinian conflict: Israel attacks the Palestine Liberation Organization headquarters in Tunisia during "Operation Wooden Leg".
November 19 » Pennzoil wins a US$10.53 billion judgment against Texaco, in the largest civil verdict in the history of the United States, stemming from Texaco executing a contract to buy Getty Oil after Pennzoil had entered into an unsigned, yet still binding, buyout contract with Getty.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I34381.php : accessed February 25, 2026), "Wilhelmus Johannes Jansen (1911-1985)".
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