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.
March 18 » Macario Sakay issues Presidential Order No. 1 of his Tagalog Republic.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
November 29 » The Pittsburgh Stars defeated the Philadelphia Athletics, 11–0 to win the first championship associated with an American national professional football league.
December 28 » The Syracuse Athletic Club defeated the New York Philadelphians, 5–0, in the first indoor professional football game, which was held at Madison Square Garden.
Day of death July 27, 1981
The temperature on July 27, 1981 was between 11.6 °C and 20.9 °C and averaged 16.1 °C. There was 14.9 hours of sunshine (94%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. 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.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
January 10 » Salvadoran Civil War: The FMLN launches its first major offensive, gaining control of most of Morazán and Chalatenango departments
April 27 » Xerox PARC introduces the computer mouse.
May 5 » Bobby Sands dies in the Long Kesh prison hospital after 66 days of hunger-striking, aged 27.
May 24 » Ecuadorian president Jaime Roldós Aguilera, his wife, and his presidential committee die in an aircraft accident while travelling from Quito to Zapotillo minutes after the president gave a famous speech regarding the 24 de mayo anniversary of the Battle of Pichincha.
August 1 » MTV begins broadcasting in the United States and airs its first video, "Video Killed the Radio Star" by The Buggles.
November 1 » Antigua and Barbuda gains independence from the United Kingdom.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I28413.php : accessed December 25, 2025), "Hendrik Maria Valkaert (1902-1981)".
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