The temperature on June 16, 1911 was between 4.2 °C and 19.1 °C and averaged 13.0 °C. There was 9.4 hours of sunshine (56%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
Day of death October 20, 1959
The temperature on October 20, 1959 was between 5.2 °C and 15.3 °C and averaged 9.8 °C. There was 0.8 mm of rain during 0.3 hours. There was 5.2 hours of sunshine (50%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 1 » Cuban Revolution: Fulgencio Batista, dictator of Cuba, is overthrown by Fidel Castro's forces.
January 4 » Luna 1 becomes the first spacecraft to reach the vicinity of the Moon.
February 3 » Rock and roll musicians Buddy Holly, Ritchie Valens, and J. P. "The Big Bopper" Richardson are killed in a plane crash near Clear Lake, Iowa.
August 31 » A parcel bomb sent by Ngô Đình Nhu, younger brother and chief adviser of South Vietnamese President Ngô Đình Diệm, fails to kill King Norodom Sihanouk of Cambodia.
October 21 » In New York City, the Solomon R. Guggenheim Museum opens to the public.
December 3 » The current flag of Singapore is adopted, six months after Singapore became self-governing within the British Empire.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I550510.php : accessed January 25, 2026), "Petronella Maria Johanna Kolsteren (1911-1959)".
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