January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
January 23 » Second Boer War: The Battle of Spion Kop between the forces of the South African Republic and the Orange Free State and British forces ends in a British defeat.
February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
April 2 » The United States Congress passes the Foraker Act, giving Puerto Rico limited self-rule.
April 14 » The Exposition Universelle begins.
April 15 » Philippine–American War: Filipino guerrillas launch a surprise attack on U.S. infantry and begin a four-day siege of Catubig, Philippines.
Day of death January 27, 1900
The temperature on January 27, 1900 was about 3.7 °C. The airpressure was 75 cm mercury. The atmospheric humidity was 88%. Source: KNMI
March 13 » British forces occupy Bloemfontein, Orange Free State, during the Second Boer War.
March 24 » Mayor of New York City Robert Anderson Van Wyck breaks ground for a new underground "Rapid Transit Railroad" that would link Manhattan and Brooklyn.
May 17 » The children's novel The Wonderful Wizard of Oz, by L. Frank Baum, is first published in the United States. The first copy is given to the author's sister.
May 29 » N'Djamena is founded as Fort-Lamy by the French commander Émile Gentil.
June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
July 9 » The Governor of Shanxi province in North China orders the execution of 45 foreign Christian missionaries and local church members, including children.
When copying data from this family tree, please include a reference to the origin: Tijs van den Brink, "Parentele of Geurt Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/geurt-jacobs/I108612.php : accessed February 18, 2026), "Geertje van Hierden (1900-1900)".
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