March 18 » AFC Ajax Amsterdam, The Netherlands's biggest and most successful football club, was founded.
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 18 » The United Kingdom proclaims a protectorate over Tonga.
June 25 » The Taoist monk Wang Yuanlu discovers the Dunhuang manuscripts, a cache of ancient texts that are of great historical and religious significance, in the Mogao Caves of Dunhuang, China.
October 19 » Max Planck discovers Planck's law of black-body radiation.
November 7 » The People's Party is founded in Cuba.
Day of death July 25, 1900
The temperature on July 25, 1900 was about 24.4 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 66%. Source: KNMI
March 13 » British forces occupy Bloemfontein, Orange Free State, during the Second Boer War.
March 16 » Sir Arthur Evans purchased the land around the ruins of Knossos, the largest Bronze Age archaeological site on Crete.
June 14 » Hawaii becomes a United States territory.
June 20 » Baron Eduard Toll, leader of the Russian Polar Expedition of 1900, departs Saint Petersburg in Russia on the explorer ship Zarya, never to return.
July 27 » Kaiser Wilhelm II makes a speech comparing Germans to Huns; for years afterwards, "Hun" would be a disparaging name for Germans.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I30591.php : accessed February 7, 2026), "Geertruida Bijsterbosch (1900-1900)".
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