The temperature on July 3, 1911 was between 4.0 °C and 17.0 °C and averaged 10.8 °C. There was 3.0 mm of rain. There was 6.9 hours of sunshine (41%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
April 2 » The Australian Bureau of Statistics conducts the country's first national census.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 15 » More than 300 Chinese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Emilio Madero take the city of Torreón from the Federales.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
Day of marriage April 18, 1931
The temperature on April 18, 1931 was between -1.5 °C and 10.6 °C and averaged 4.5 °C. There was 0.3 mm of rain during 0.2 hours. There was 7.1 hours of sunshine (51%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 7 » Guy Menzies flies the first solo non-stop trans-Tasman flight (from Australia to New Zealand) in 11 hours and 45 minutes, crash-landing on New Zealand's west coast.
March 11 » Ready for Labour and Defence of the USSR, abbreviated as GTO, is introduced in the Soviet Union.
April 14 » The Spanish Cortes deposes King Alfonso XIII and proclaims the Second Spanish Republic.
May 1 » The Empire State Building is dedicated in New York City.
May 14 » Five unarmed civilians are killed in the Ådalen shootings, as the Swedish military is called in to deal with protesting workers.
July 1 » Wiley Post and Harold Gatty become the first people to circumnavigate the globe in a single-engined monoplane aircraft.
Day of death February 11, 1975
The temperature on February 11, 1975 was between -0.6 °C and 10.2 °C and averaged 5.3 °C. There was 0.6 mm of rain during 1.2 hours. There was 0.2 hours of sunshine (2%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
January 2 » The Federal Rules of Evidence are approved by the United States Congress.
March 11 » Vietnam War: North Vietnamese and Viet Cong guerrilla forces establish control over Buôn Ma Thuột commune from the South Vietnamese army.
April 2 » Vietnam War: Thousands of civilian refugees flee from Quảng Ngãi Province in front of advancing North Vietnamese troops.
July 6 » The Comoros declares independence from France.
August 4 » The Japanese Red Army takes more than 50 hostages at the AIA Building housing several embassies in Kuala Lumpur, Malaysia. The hostages include the U.S. consul and the Swedish Chargé d'affaires. The gunmen win the release of five imprisoned comrades and fly with them to Libya.
August 15 » Bangladeshi leader Sheikh Mujibur Rahman is killed along with most members of his family during a military coup.
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/I138170.php : accessed October 19, 2026), "Jurjen de Haan (1911-1975)".
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