The temperature on May 6, 1889 was about 23.5 °C. The air pressure was 4 kgf/m2 and came mainly from the east-southeast. The airpressure was 76 cm mercury. The atmospheric humidity was 45%. Source: KNMI
January 30 » Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.
March 23 » The Ahmadiyya Muslim Community is established by Mirza Ghulam Ahmad in Qadian, British India.
April 1 » The University of Northern Colorado was established, as the Colorado State Normal School.
May 2 » Menelik II, Emperor of Ethiopia, signs the Treaty of Wuchale, giving Italy control over Eritrea.
September 28 » The General Conference on Weights and Measures (CGPM) defines the length of a meter.
October 24 » Henry Parkes delivers the Tenterfield Oration, effectively starting the federation process in Australia.
Day of marriage February 3, 1911
The temperature on February 3, 1911 was between -2.1 °C and 6.8 °C and averaged 3.2 °C. There was 0.3 mm of rain. There was 7.8 hours of sunshine (85%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
January 21 » The first Monte Carlo Rally takes place.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
September 24 » His Majesty's Airship No. 1, Britain's first rigid airship, is wrecked by strong winds before her maiden flight at Barrow-in-Furness.
October 24 » Orville Wright remains in the air nine minutes and 45 seconds in a glider at Kill Devil Hills, North Carolina.
November 1 » World's first combat aerial bombing mission takes place in Libya during the Italo-Turkish War. Second Lieutenant Giulio Gavotti of Italy drops several small bombs.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
Day of death August 20, 1963
The temperature on August 20, 1963 was between 11.0 °C and 15.4 °C and averaged 12.6 °C. There was 25.4 mm of rain during 7.7 hours. The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
April 11 » Pope John XXIII issues Pacem in terris, the first encyclical addressed to all Christians instead of only Catholics, and which described the conditions for world peace in human terms.
April 26 » In Libya, amendments to the constitution transform Libya (United Kingdom of Libya) into one national unity (Kingdom of Libya) and allows for female participation in elections.
July 12 » Pauline Reade, 16, disappears in Gorton, England, the first victim in the Moors murders.
November 25 » President John F. Kennedy is buried at Arlington National Cemetery in Arlington County, Virginia, across the Potomac River from Washington, D.C.; his assassin, Lee Harvey Oswald, is buried on the same day in Fort Worth, Texas.
November 29 » "I Want to Hold Your Hand", recorded on October 17, 1963, is released by the Beatles in the United Kingdom.
December 21 » "Bloody Christmas" begins in Cyprus, ultimately resulting in the displacement of 25,000–30,000 Turkish Cypriots and destruction of more than 100 villages.
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I2449.php : accessed January 6, 2026), "Maria Elisabeth Aalbers (1889-1963)".
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