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 7 » A Chinese immigrant in San Francisco falls ill to bubonic plague in the first plague epidemic in the continental United States.
February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
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.
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 May 23, 1971
The temperature on May 23, 1971 was between 10.7 °C and 22.5 °C and averaged 15.5 °C. There was 5.8 mm of rain during 1.8 hours. There was 7.1 hours of sunshine (44%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
February 9 » Apollo program: Apollo 14 returns to Earth after the third manned Moon landing.
April 19 » Launch of Salyut 1, the first space station.
July 31 » Apollo program: Apollo 15 astronauts become the first to ride in a lunar rover.
September 8 » In Washington, D.C., the John F. Kennedy Center for the Performing Arts is inaugurated, with the opening feature being the premiere of Leonard Bernstein's Mass.
December 16 » Bangladesh Liberation War and Indo-Pakistani War of 1971: The ceasefire of the Pakistan Army brings an end to both conflicts. This is commemorated annually as Victory Day in Bangladesh, and as Vijay Diwas in India.
December 20 » The international aid organization Doctors Without Borders is founded by Bernard Kouchner and a group of journalists in Paris, France.
When copying data from this family tree, please include a reference to the origin: A.R. Hamstra, "Family tree Hamstra - Spanjer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hamstra-spanjer/R164.php : accessed January 1, 2026), "Gertie Pott (1900-1971)".
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