The temperature on December 15, 1912 was between 8.3 °C and 12.2 °C and averaged 9.6 °C. There was 6.5 mm of rain. There was 0.1 hours of sunshine (1%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west-southwest. Source: KNMI
January 11 » Immigrant textile workers in Lawrence, Massachusetts, go on strike when wages are reduced in response to a mandated shortening of the work week.
January 17 » British polar explorer Captain Robert Falcon Scott reaches the South Pole, one month after Roald Amundsen.
February 14 » The U.S. Navy commissions its first class of diesel-powered submarines.
May 8 » Paramount Pictures is founded.
May 13 » The Royal Flying Corps, the forerunner of the Royal Air Force, is established in the United Kingdom.
July 8 » Henrique Mitchell de Paiva Couceiro leads an unsuccessful royalist attack against the First Portuguese Republic in Chaves.
Day of death October 23, 1960
The temperature on October 23, 1960 was between 9.8 °C and 11.7 °C and averaged 11.0 °C. There was 4.1 mm of rain during 3.9 hours. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
January 18 » Capital Airlines Flight 20 crashes into a farm in Charles City County, Virginia, killing all 50 aboard, the third fatal Capital Airlines crash in as many years.
April 4 » France agrees to grant independence to the Mali Federation, a union of Senegal and French Sudan.
April 9 » Dr Hendrik Verwoerd, Prime Minister of South Africa and architect of apartheid, narrowly survives an assassination attempt by a white farmer, David Pratt in Johannesburg.
May 9 » The Food and Drug Administration announces it will approve birth control as an additional indication for Searle's Enovid, making Enovid the world's first approved oral contraceptive pill.
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)).
October 12 » Soviet Premier Nikita Khrushchev pounds his shoe on a desk at the United Nations to protest a Philippine assertion.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I1684.php : accessed February 6, 2026), "Lammert Zijlstra (1912-1960)".
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