February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
March 18 » AFC Ajax Amsterdam, The Netherlands's biggest and most successful football club, was founded.
April 14 » The Exposition Universelle begins.
May 1 » The Scofield Mine disaster kills over 200 men in Scofield, Utah in what is to date the fifth-worst mining accident in United States history.
May 23 » American Civil War: Sergeant William Harvey Carney is awarded the Medal of Honor for his heroism in the Assault on the Battery Wagner in 1863.
May 29 » N'Djamena is founded as Fort-Lamy by the French commander Émile Gentil.
Day of death June 20, 1900
The temperature on June 20, 1900 was about 14.4 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 90%. Source: KNMI
February 28 » The Second Boer War: The 118-day "Siege of Ladysmith" is lifted.
April 2 » The United States Congress passes the Foraker Act, giving Puerto Rico limited self-rule.
May 26 » Thousand Days' War: The Colombian Conservative Party turns the tide of war in their favor with victory against the Colombian Liberal Party in the Battle of Palonegro.
July 29 » In Italy, King Umberto I of Italy is assassinated by the anarchist Gaetano Bresci.
September 13 » Filipino insurgents defeat a small American column in the Battle of Pulang Lupa, during the Philippine–American War.
November 7 » The People's Party is founded in Cuba.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I107908.php : accessed October 5, 2026), "Jan de Haan (1900-1900)".
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