The temperature on September 11, 1960 was between 11.2 °C and 23.1 °C and averaged 16.7 °C. There was 10.4 hours of sunshine (80%). The almost cloudless was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
January 21 » A coal mine collapses at Holly Country, South Africa, killing 435 miners.
April 27 » Togo gains independence from French-administered UN trusteeship.
June 19 » The first NASCAR race was held at Charlotte Motor Speedway.
July 4 » Due to the post-Independence Day admission of Hawaii as the 50th U.S. state on August 21, 1959, the 50-star flag of the United States debuts in Philadelphia, almost ten and a half months later (see Flag Acts (United States)).
July 11 » To Kill a Mockingbird by Harper Lee is first published, in the United States.
November 4 » At the Kasakela Chimpanzee Community in Tanzania, Dr. Jane Goodall observes chimpanzees creating tools, the first-ever observation in non-human animals.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I27017.php : accessed March 2, 2026), "Sjoerd Visser (1926-1960)".
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