The temperature on April 16, 1961 was between 8.5 °C and 11.9 °C and averaged 9.9 °C. There was 4.2 mm of rain during 7.6 hours. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
March 2 » John F. Kennedy announces the creation of the Peace Corps in a nationally televised broadcast.
March 15 » At the 1961 Commonwealth Prime Ministers' Conference, South Africa announces that it will withdraw from the Commonwealth when the South African Constitution of 1961 comes into effect.
May 25 » Apollo program: U.S. President John F. Kennedy announces, before a special joint session of the U.S. Congress, his goal to initiate a project to put a "man on the Moon" before the end of the decade.
October 1 » The United States Defense Intelligence Agency is formed, becoming the country's first centralized military intelligence organization.
December 15 » Adolf Eichmann is sentenced to death after being found guilty by an Israeli court of 15 criminal charges, including charges of crimes against humanity, crimes against the Jewish people, and membership of an outlawed organization.
December 17 » Niterói circus fire: Fire breaks out during a performance by the Gran Circus Norte-Americano in the city of Niterói, Rio de Janeiro, Brazil, killing more than 500.
When copying data from this family tree, please include a reference to the origin: Hans van der Werff, "Family tree Van der Werff", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-der-werff/I6331.php : accessed February 2, 2026), "Mattheas Sytses Syttema (1906-1961)".
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