The temperature on March 24, 1911 was between 0.3 °C and 7.7 °C and averaged 3.6 °C. There was 0.9 mm of rain. There was 7.1 hours of sunshine (57%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
Christening day March 26, 1911
The temperature on March 26, 1911 was between 0.9 °C and 3.6 °C and averaged 2.8 °C. There was 0.6 mm of rain. The average windspeed was 6 Bft (strong wind) and was prevailing from the east-northeast. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
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.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
September 29 » Italy declares war on the Ottoman Empire.
October 24 » Orville Wright remains in the air nine minutes and 45 seconds in a glider at Kill Devil Hills, North Carolina.
Day of marriage October 19, 1935
The temperature on October 19, 1935 was between 8.6 °C and 13.3 °C and averaged 10.9 °C. There was 3.2 mm of rain during 2.3 hours. There was 3.7 hours of sunshine (35%). The average windspeed was 6 Bft (strong wind) and was prevailing from the southwest. Source: KNMI
February 26 » Robert Watson-Watt carries out a demonstration near Daventry which leads directly to the development of radar in the United Kingdom.
May 31 » A 7.7 Mw earthquake destroys Quetta in modern-day Pakistan killing 40,000.
November 3 » George II of Greece regains his throne through a popular, though possibly fixed, plebiscite.
November 24 » The Senegalese Socialist Party holds its second congress.
December 9 » Walter Liggett, American newspaper editor and muckraker, is killed in a gangland murder.
December 17 » First flight of the Douglas DC-3.
Day of death May 9, 1970
The temperature on May 9, 1970 was between 10.8 °C and 21.4 °C and averaged 15.9 °C. There was 0.4 mm of rain during 0.2 hours. There was 7.9 hours of sunshine (51%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
April 1 » The first of over 670,000 AMC Gremlins are released into North America to compete with foreign imported cars.
July 3 » The Troubles: The "Falls Curfew" begins in Belfast, Northern Ireland.
August 26 » A new feminist movement leads a nationwide Women's Strike for Equality.
September 12 » Dawson's Field hijackings: Palestinian terrorists blow up three hijacked airliners in Jordan, continuing to hold the passengers hostage in various undisclosed locations in Amman.
October 10 » Canada's October Crisis escalates when Quebec's vice-premier is kidnapped by members of the FLQ.
November 25 » In Japan, author Yukio Mishima and one compatriot commit ritualistic seppuku after an unsuccessful coup attempt.
Day of burial May 14, 1970
The temperature on May 14, 1970 was between 7.7 °C and 20.1 °C and averaged 13.2 °C. There was 7.9 hours of sunshine (51%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
March 18 » Lon Nol ousts Prince Norodom Sihanouk of Cambodia.
July 3 » Dan-Air Flight 1903 crashes into the Les Agudes mountain in the Montseny Massif near the village of Arbúcies in Catalonia, Spain, killing all 112 people aboard.
July 21 » After 11 years of construction, the Aswan High Dam in Egypt is completed.
September 1 » Palestinian guerrillas attack the motorcade of King Hussein of Jordan in a failed assassination attempt.
November 21 » Vietnam War: Operation Ivory Coast: A joint United States Air Force and Army team raids the Sơn Tây prisoner-of-war camp in an attempt to free American prisoners of war thought to be held there.
November 26 » In Basse-Terre, Guadeloupe, 1.5 inches (38.1mm) of rain fall in a minute, the heaviest rainfall ever recorded.
When copying data from this family tree, please include a reference to the origin: Jo Consten, "Family tree Consten Koolen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-consten-koolen/I2976.php : accessed February 21, 2026), "Jan Joseph "Leonard" Consten (1911-1970)".
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