The temperature on December 31, 1889 was about -2.7 °C. The air pressure was 6 kgf/m2 and came mainly from the south-southwest. The airpressure was 77 cm mercury. The atmospheric humidity was 96%. Source: KNMI
January 30 » Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.
March 23 » The Ahmadiyya Muslim Community is established by Mirza Ghulam Ahmad in Qadian, British India.
March 31 » The Eiffel Tower is officially opened.
June 6 » The Great Seattle Fire destroys all of downtown Seattle.
September 23 » Nintendo Koppai (Later Nintendo Company, Limited) is founded by Fusajiro Yamauchi to produce and market the playing card game Hanafuda.
November 2 » North Dakota and South Dakota are admitted as the 39th and 40th U.S. states.
Day of death April 18, 1964
The temperature on April 18, 1964 was between 10.9 °C and 19.2 °C and averaged 14.8 °C. There was 1.1 mm of rain during 2.4 hours. There was 3.9 hours of sunshine (28%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
January 30 » In a bloodless coup, General Nguyễn Khánh overthrows General Dương Văn Minh's military junta in South Vietnam.
February 10 » Melbourne–Voyager collision: The aircraft carrier HMASMelbourne collides with and sinks the destroyer HMASVoyager off the south coast of New South Wales, Australia, killing 82.
May 29 » The Arab League meets in East Jerusalem to discuss the Palestinian question, leading to the formation of the Palestine Liberation Organization.
July 20 » Vietnam War: Viet Cong forces attack the capital of Định Tường Province, Cái Bè, killing 11 South Vietnamese military personnel and 40 civilians (30 of whom are children).
July 27 » Vietnam War: Five thousand more American military advisers are sent to South Vietnam bringing the total number of United States forces in Vietnam to 21,000.
December 24 » Flying Tiger Line Flight 282 crashes after takeoff from San Francisco International Airport, killing three.
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/I106675.php : accessed February 14, 2026), "Sjoerd de Jong (1889-1964)".
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