The temperature on December 30, 1890 was about -15.6 °C. The air pressure was 3 kgf/m2 and came mainly from the east-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 91%. Source: KNMI
March 20 » Prime Minister of the German Empire Otto von Bismarck is dismissed by Emperor Wilhelm II.
April 14 » The Pan-American Union is founded by the First International Conference of American States in Washington, D.C.
July 10 » Wyoming is admitted as the 44th U.S. state.
October 12 » Uddevalla Suffrage Association is formed.
December 15 » Hunkpapa Lakota leader Sitting Bull is killed on Standing Rock Indian Reservation, leading to the Wounded Knee Massacre.
December 30 » Following the Wounded Knee Massacre, the United States Army and Lakota warriors face off in the Drexel Mission Fight.
Day of marriage July 29, 1911
The temperature on July 29, 1911 was between 17.5 °C and 30.4 °C and averaged 24.6 °C. There was 12.0 hours of sunshine (76%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
August 29 » Ishi, considered the last Native American to make contact with European Americans, emerges from the wilderness of northeastern California.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
November 11 » Many cities in the Midwestern United States break their record highs and lows on the same day as a strong cold front rolls through.
When copying data from this family tree, please include a reference to the origin: Gerrit Jan Georg, "Family tree Georg en Kiel", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-georg/I3575.php : accessed February 16, 2026), "Harm Koolhof (1890-± 1932)".
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