January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
April 30 » Hawaii becomes a territory of the United States, with Sanford B. Dole as governor.
May 1 » The Scofield Mine disaster kills over 200 men in Scofield, Utah in what is to date the fifth-worst mining accident in United States history.
May 18 » The United Kingdom proclaims a protectorate over Tonga.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of death April 25, 1980
The temperature on April 25, 1980 was between 4.2 °C and 8.0 °C and averaged 6.4 °C. There was 1.5 mm of rain during 2.5 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) 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.
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/I168188.php : accessed October 23, 2026), "Jacobus de Vries (1900-1980)".
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