The temperature on June 28, 1961 was between 8.8 °C and 20.7 °C and averaged 15.5 °C. There was 13.4 hours of sunshine (80%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
January 26 » John F. Kennedy appoints Janet G. Travell to be the first woman Physician to the President.
January 27 » The Soviet submarine S-80 sinks when its snorkel malfunctions, flooding the boat.
March 14 » A USAF B-52 bomber crashes near near Yuba City, California whilst carrying nuclear weapons.
March 29 » The Twenty-third Amendment to the United States Constitution is ratified, allowing residents of Washington, D.C., to vote in presidential elections.
May 19 » At Silchar Railway Station, Assam, 11 Bengalis die when police open fire on protesters demanding state recognition of Bengali language in the Bengali Language Movement.
June 19 » Kuwait declares independence from the United Kingdom.
When copying data from this family tree, please include a reference to the origin: Dirk Zwinderman, "Family tree Zwinderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-zwinderman/I4558.php : accessed February 28, 2026), "Harm Sterenborg (1885-1961)".
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