January 16 » The United States Senate accepts the Anglo-German treaty of 1899 in which the United Kingdom renounces its claims to the Samoan islands.
February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
March 13 » British forces occupy Bloemfontein, Orange Free State, during the Second Boer War.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
July 9 » The Governor of Shanxi province in North China orders the execution of 45 foreign Christian missionaries and local church members, including children.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of death April 21, 1990
The temperature on April 21, 1990 was between 7.1 °C and 18.2 °C and averaged 12.9 °C. There was -0.1 mm of rain. There was 9.3 hours of sunshine (65%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
March 2 » Nelson Mandela is elected deputy President of the African National Congress.
March 21 » Namibia becomes independent after 75 years of South African rule.
July 11 » Oka Crisis: First Nations land dispute in Quebec, Canada begins.
July 16 » The Luzon earthquake strikes the Philippines with an intensity of 7.7, affecting Benguet, Pangasinan, Nueva Ecija, La Union, Aurora, Bataan, Zambales and Tarlac.
August 6 » Gulf War: The United Nations Security Council orders a global trade embargo against Iraq in response to Iraq's invasion of Kuwait.
November 12 » Tim Berners-Lee publishes a formal proposal for the World Wide Web.
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/I166834.php : accessed October 20, 2026), "Willem Hiemstra (1900-1990)".
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