February 6 » The Permanent Court of Arbitration, an international arbitration court at The Hague, is created when the Senate of the Netherlands ratifies an 1899 peace conference decree.
February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
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 18 » The United Kingdom proclaims a protectorate over Tonga.
July 2 » Jean Sibelius' Finlandia receives its première performance in Helsinki with the Helsinki Philharmonic Society conducted by Robert Kajanus.
July 19 » The first line of the Paris Métro opens for operation.
Day of death July 22, 1900
The temperature on July 22, 1900 was about 19.6 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 80%. Source: KNMI
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/I136938.php : accessed February 26, 2026), "Thomas Delfstra (1900-1900)".
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