January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 28 » The Second Boer War: The 118-day "Siege of Ladysmith" is lifted.
May 26 » Thousand Days' War: The Colombian Conservative Party turns the tide of war in their favor with victory against the Colombian Liberal Party in the Battle of Palonegro.
June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
July 19 » The first line of the Paris Métro opens for operation.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of death December 23, 1966
The temperature on December 23, 1966 was between 3.8 °C and 8.8 °C and averaged 6.9 °C. There was 1.3 mm of rain during 1.9 hours. The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
May 30 » Former Congolese Prime Minister, Évariste Kimba, and several other politicians are publicly executed in Kinshasa on the orders of President Joseph Mobutu.
July 6 » Malawi becomes a republic, with Hastings Banda as its first President.
August 29 » The Beatles perform their last concert before paying fans at Candlestick Park in San Francisco.
September 6 » Prime Minister Hendrik Verwoerd, the architect of apartheid, is stabbed to death in Cape Town, South Africa during a parliamentary meeting.
October 17 » The 23rd Street Fire in New York City kills 12 firefighters.
November 15 » Project Gemini: Gemini 12 completes the program's final mission, when it splashes down safely in the Atlantic Ocean.
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/I169789.php : accessed February 21, 2026), "Elske Gerdine Hessenius (1900-1966)".
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