January 31 » Czechoslav Trade Union Association is founded in Prague.
February 28 » Queen Ranavalona III, the last monarch of Madagascar, is deposed by a French military force.
May 26 » Dracula, a Gothic horror novel by Irish author Bram Stoker, is published.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
Day of death July 30, 1973
The temperature on July 30, 1973 was between 13.7 °C and 18.0 °C and averaged 15.7 °C. There was 0.9 mm of rain during 1.0 hours. There was 0.3 hours of sunshine (2%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. 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 22 » The crew of Apollo 17 addresses a joint session of Congress after the completion of the final Apollo moon landing mission.
August 8 » Kim Dae-jung, a South Korean politician and later president of South Korea, is kidnapped.
August 9 » Mars 7 is launched from the USSR.
September 19 » King Carl XVI Gustaf of Sweden has his investiture.
November 16 » U.S. President Richard Nixon signs the Trans-Alaska Pipeline Authorization Act into law, authorizing the construction of the Alaska Pipeline.
December 15 » John Paul Getty III, grandson of American billionaire J. Paul Getty, is found alive near Naples, Italy, after being kidnapped by an Italian gang on July 10.
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/I201937.php : accessed October 12, 2026), "Pieter Olthof (1897-1973)".
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