January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
January 23 » Second Boer War: The Battle of Spion Kop between the forces of the South African Republic and the Orange Free State and British forces ends in a British defeat.
February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
July 27 » Kaiser Wilhelm II makes a speech comparing Germans to Huns; for years afterwards, "Hun" would be a disparaging name for Germans.
August 3 » The Firestone Tire and Rubber Company is founded.
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.
February 11 » Buster Douglas, a 42:1 underdog, knocks out Mike Tyson in ten rounds at Tokyo to win boxing's world Heavyweight title.
June 19 » The current international law defending indigenous peoples, Indigenous and Tribal Peoples Convention, 1989, is ratified for the first time by Norway.
July 6 » The Electronic Frontier Foundation is founded.
August 23 » West and East Germany announce that they will reunite on October 3.
September 29 » The YF-22, which would later become the F-22 Raptor, flies for the first time.
November 16 » Pop group Milli Vanilli are stripped of their Grammy Award because the duo did not sing at all on the Girl You Know It's True album. Session musicians had provided all the vocals.
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 23, 2026), "Willem Hiemstra (1900-1990)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.