The temperature on May 10, 1911 was between 10.5 °C and 23.7 °C and averaged 17.4 °C. There was 12.1 hours of sunshine (79%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
October 24 » Orville Wright remains in the air nine minutes and 45 seconds in a glider at Kill Devil Hills, North Carolina.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
Day of marriage April 24, 1935
The temperature on April 24, 1935 was between 6.7 °C and 11.6 °C and averaged 8.8 °C. There was 12.8 mm of rain during 8.3 hours. There was 0.3 hours of sunshine (2%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the north-northeast. Source: KNMI
February 12 » USSMacon, one of the two largest helium-filled airships ever created, crashes into the Pacific Ocean off the coast of California and sinks.
February 28 » DuPont scientist Wallace Carothers invents nylon.
April 1 » India's central banking institution, The Reserve Bank of India, is formed.
September 2 » The Labor Day Hurricane, the most intense hurricane to strike the United States, makes landfall at Long Key, Florida, killing at least 400.
October 20 » The Long March, a mammoth retreat undertaken by the armed forces of the Chinese Communist Party a year prior, ends.
December 30 » The Italian Air Force bombs a Swedish Red Cross hospital during the Second Italo-Abyssinian War.
Day of death July 1, 1969
The temperature on July 1, 1969 was between 9.0 °C and 24.4 °C and averaged 17.4 °C. There was 9.1 hours of sunshine (55%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
January 17 » Black Panther Party members Bunchy Carter and John Huggins are killed during a meeting in Campbell Hall on the campus of UCLA.
January 30 » The Beatles' last public performance, on the roof of Apple Records in London. The impromptu concert is broken up by the police.
April 22 » The formation of the Communist Party of India (Marxist-Leninist) is announced at a mass rally in Calcutta.
August 17 » Category 5 Hurricane Camille hits the U.S. Gulf Coast, killing 256 and causing $1.42 billion in damage.
November 10 » National Educational Television (the predecessor to the Public Broadcasting Service) in the United States debuts Sesame Street.
November 15 » Vietnam War: In Washington, D.C., 250,000-500,000 protesters staged a peaceful demonstration against the war, including a symbolic "March Against Death".
When copying data from this family tree, please include a reference to the origin: J. van Broekhoven, "Database Van Broekhoven", database, Genealogy Online (https://www.genealogieonline.nl/database-van-broekhoven/I215035.php : accessed March 5, 2026), "Henrietta Catharina Isabella de Groot (1911-1969)".
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