March 16 » In Melbourne the representatives of five colonies adopted a constitution, which would become the basis of the Commonwealth of Australia.
April 25 » Spanish–American War: The United States declares war on Spain.
June 10 » Spanish–American War: In the Battle of Guantánamo Bay, U.S. Marines begin the American invasion of Spanish-held Cuba.
June 11 » The Hundred Days' Reform, a planned movement to reform social, political, and educational institutions in China, is started by the Guangxu Emperor, but is suspended by Empress Dowager Cixi after 104 days. (The failed reform led to the abolition of the Imperial examination in 1905.)
June 21 » The United States captures Guam from Spain. The few warning shots fired by the U.S. naval vessels are misinterpreted as salutes by the Spanish garrison, which was unaware that the two nations were at war.
September 21 » Empress Dowager Cixi seizes power and ends the Hundred Days' Reform in China.
Day of death December 15, 1978
The temperature on December 15, 1978 was between 4.7 °C and 7.3 °C and averaged 6.3 °C. There was 6.8 mm of rain during 3.8 hours. The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
February 8 » Proceedings of the United States Senate are broadcast on radio for the first time.
February 24 » The Yuba County Five disappear in California. Four of their bodies are found four months later.
May 12 » In Zaire, rebels occupy the city of Kolwezi, the mining center of the province of Shaba (now known as Katanga); the local government asks the US, France and Belgium to restore order.
May 25 » The first of a series of bombings orchestrated by the Unabomber detonates at Northwestern University resulting in minor injuries.
June 28 » The United States Supreme Court, in Regents of the University of California v. Bakke bars quota systems in college admissions.
December 22 » The pivotal Third Plenum of the 11th National Congress of the Communist Party of China is held in Beijing, with Deng Xiaoping reversing Mao-era policies to pursue a program for Chinese economic reform.
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/I199364.php : accessed January 3, 2026), "Sjoerd de Vries (1898-1978)".
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