The temperature on March 25, 1960 was between 5.6 °C and 10.1 °C and averaged 7.0 °C. There was 1.9 mm of rain during 2.5 hours. There was -0.1 hours of sunshine (0%). The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
April 25 » The United States Navy submarine USSTriton completes the first submerged circumnavigation of the globe.
July 11 » To Kill a Mockingbird by Harper Lee is first published, in the United States.
July 12 » Orlyonok, the main Young Pioneer camp of the Russian SFSR, is founded.
August 12 » Echo 1A, NASA's first successful communications satellite, is launched.
October 12 » Soviet Premier Nikita Khrushchev pounds his shoe on a desk at the United Nations to protest a Philippine assertion.
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: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I423830.php : accessed February 15, 2026), "Jan Horstman (± 1944-1960)".
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