March 7 » Second Boer War: Boers, led by Koos de la Rey, inflict the biggest defeat upon the British since the beginning of the war, at Tweebosch.
April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
June 28 » The U.S. Congress passes the Spooner Act, authorizing President Theodore Roosevelt to acquire rights from Colombia for the Panama Canal.
August 22 » Cadillac Motor Company is founded.
Day of death September 30, 1999
The temperature on September 30, 1999 was between 12.2 °C and 18.6 °C and averaged 14.6 °C. There was 14.0 mm of rain during 4.2 hours. There was 1.2 hours of sunshine (10%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 1 » Euro currency is introduced in 11 member nations of the European Union (with the exception of the United Kingdom, Denmark, Greece and Sweden; Greece later adopts the euro).
March 20 » Legoland California, the first Legoland outside of Europe, opens in Carlsbad, California, US.
April 14 » NATO mistakenly bombs a convoy of ethnic Albanian refugees. Yugoslav officials say 75 people were killed.
July 20 » The Chinese Communist Party begins a persecution campaign against Falun Gong, arresting thousands nationwide.
August 7 » The Chechnya-based Islamic International Brigade invades neighboring Dagestan.
October 12 » The World Population reaches 6 billion.
When copying data from this family tree, please include a reference to the origin: Peter de Jong, "Pedigree of De Jong, Koelé families", database, Genealogy Online (https://www.genealogieonline.nl/de-jong-stamboom/I5334.php : accessed February 16, 2026), "Johannes Koole (1902-1999)".
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