February 9 » The Davis Cup competition is established.
February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
June 17 » Boxer Rebellion: Western Allied and Japanese forces capture the Taku Forts in Tianjin, China.
October 9 » The Cook Islands become a territory of the United Kingdom.
November 7 » Second Boer War: Battle of Leliefontein, a battle during which the Royal Canadian Dragoons win three Victoria Crosses.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death May 31, 1972
The temperature on May 31, 1972 was between 8.5 °C and 14.1 °C and averaged 11.0 °C. There was 1.9 mm of rain during 1.2 hours. There was 1.9 hours of sunshine (12%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from April 5, 1967 to Tuesday, July 6, 1971 the cabinet Biesheuvel I, with Mr. B.W. Biesheuvel (ARP) as prime minister.
In The Netherlands , there was from Thursday, July 20, 1972 to Friday, May 11, 1973 the cabinet Biesheuvel II, with Mr. B.W. Biesheuvel (ARP) as prime minister.
April 13 » Vietnam War: The Battle of An Lộc begins.
April 22 » Increased American bombing in Vietnam prompts anti-war protests in Los Angeles, New York City, and San Francisco.
April 25 » Vietnam War: Nguyen Hue Offensive: The North Vietnamese 320th Division forces 5,000 South Vietnamese troops to retreat and traps about 2,500 others northwest of Kontum.
June 18 » Staines air disaster: One hundred eighteen people are killed when a BEA H.S. Trident crashes two minutes after take off from London's Heathrow Airport.
June 23 » Title IX of the United States Civil Rights Act of 1964 is amended to prohibit sexual discrimination to any educational program receiving federal funds.
August 14 » An Ilyushin Il-62 airliner crashes near Königs Wusterhausen, East Germany, due to an in-flight fire, killing 156.
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/I2402.php : accessed February 9, 2026), "Ruurd Wartena (1900-1972)".
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