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.
April 5 » Archaeologists in Knossos, Crete, discover a large cache of clay tablets with hieroglyphic writing in a script they call Linear B.
May 18 » The United Kingdom proclaims a protectorate over Tonga.
June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
October 9 » The Cook Islands become a territory of the United Kingdom.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage July 9, 1920
The temperature on July 9, 1920 was between 8.7 °C and 19.3 °C and averaged 14.5 °C. There was 7.2 hours of sunshine (44%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 10 » League of Nations Covenant enters into force. On January 16 the organization holds its first council meeting, in Paris.
January 17 » Alcohol Prohibition begins in the United States as the Volstead Act goes into effect.
May 16 » In Rome, Pope Benedict XV canonizes Joan of Arc.
August 19 » The Tambov Rebellion breaks out, in response to the Bolshevik policy of Prodrazvyorstka.
September 7 » Two newly purchased Savoia flying boats crash in the Swiss Alps en route to Finland where they would serve with the Finnish Air Force, killing both crews.
October 30 » The Communist Party of Australia is founded in Sydney.
Day of death May 11, 1988
The temperature on May 11, 1988 was between 6.7 °C and 21.4 °C and averaged 15.0 °C. There was 10.7 hours of sunshine (69%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
February 12 » Cold War: The 1988 Black Sea bumping incident: The U.S. missile cruiser USSYorktown(CG-48) is intentionally rammed by the Soviet frigate Bezzavetnyy in the Soviet territorial waters, while Yorktown claims innocent passage.
February 27 » Sumgait pogrom: The Armenian community in Sumgait, Azerbaijan is targeted in a violent pogrom.
July 23 » General Ne Win, effective ruler of Burma since 1962, resigns after pro-democracy protests.
September 13 » Hurricane Gilbert is the strongest recorded hurricane in the Western Hemisphere, later replaced by Hurricane Wilma in 2005 (based on barometric pressure).
December 1 » World AIDS Day was proclaimed worldwide by the UN member states.
December 21 » The first flight of Antonov An-225 Mriya, the largest aircraft in the world.
When copying data from this family tree, please include a reference to the origin: Hilbert Botter, "Family tree Botter", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-botter/I2666.php : accessed February 12, 2026), "Jantje Botter (1900-1988)".
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