January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 7 » A Chinese immigrant in San Francisco falls ill to bubonic plague in the first plague epidemic in the continental United States.
March 16 » Sir Arthur Evans purchased the land around the ruins of Knossos, the largest Bronze Age archaeological site on Crete.
June 25 » The Taoist monk Wang Yuanlu discovers the Dunhuang manuscripts, a cache of ancient texts that are of great historical and religious significance, in the Mogao Caves of Dunhuang, China.
August 14 » The Eight-Nation Alliance occupies Beijing, China, in a campaign to end the bloody Boxer Rebellion in China.
October 25 » The United Kingdom annexes the Transvaal.
Day of death April 13, 1973
The temperature on April 13, 1973 was between -1.0 °C and 8.0 °C and averaged 3.1 °C. There was 3.8 mm of rain during 1.1 hours. There was 4.0 hours of sunshine (29%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from Thursday, July 20, 1972 to Friday, May 11, 1973 the cabinet Biesheuvel II, with Mr. B.W. Biesheuvel (ARP) as prime minister.
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
January 8 » Soviet space mission Luna 21 is launched.
April 30 » Watergate scandal: U.S. President Richard Nixon announces that White House Counsel John Dean has been fired and that other top aides, most notably H. R. Haldeman and John Ehrlichman, have resigned.
May 3 » The 108-story Sears Tower in Chicago is topped out at 1,451 feet as the world's tallest building.
May 11 » Citing government misconduct, Daniel Ellsberg's charges for his involvement in releasing the Pentagon Papers to The New York Times are dismissed.
September 20 » Singer Jim Croce, songwiter and musician Maury Muehleisen and four others die when their light aircraft crashes on takeoff at Natchitoches Regional Airport in Louisiana.
September 26 » Concorde makes its first non-stop crossing of the Atlantic in record-breaking time.
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/I90576.php : accessed September 30, 2026), "Jan Albert Tammens (1900-1973)".
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