The temperature on September 5, 1909 was between 6.4 °C and 17.3 °C and averaged 12.4 °C. There was 0.4 mm of rain. There was 10.1 hours of sunshine (75%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
January 9 » Ernest Shackleton, leading the Nimrod Expedition to the South Pole, plants the British flag 97 nautical miles (180km; 112mi) from the South Pole, the farthest anyone had ever reached at that time.
January 16 » Ernest Shackleton's expedition finds the magnetic South Pole.
January 28 » United States troops leave Cuba with the exception of Guantanamo Bay Naval Base after being there since the Spanish–American War.
February 12 » The National Association for the Advancement of Colored People (NAACP) is founded.
February 15 » The Flores Theater fire in Acapulco, Mexico kills 250.
September 30 » The Cunard Line's RMS Mauretania makes a record-breaking westbound crossing of the Atlantic, that will not be bettered for 20 years.
Day of marriage August 23, 1937
The temperature on August 23, 1937 was between 14.3 °C and 19.0 °C and averaged 16.3 °C. There was 0.2 hours of sunshine (1%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
March 21 » Ponce massacre: Nineteen people in Ponce, Puerto Rico are gunned down by police acting on orders of the US-appointed Governor, Blanton C. Winship.
August 28 » Toyota Motors becomes an independent company.
September 10 » Nine nations attend the Nyon Conference to address international piracy in the Mediterranean Sea.
October 11 » The Duke and Duchess of Windsor tour Nazi Germany for 12 days and meet Adolf Hitler on the 22nd.
December 12 » Second Sino-Japanese War: USS Panay incident: Japanese aircraft bomb and sink U.S. gunboat USSPanay on the Yangtze river in China.
December 16 » Theodore Cole and Ralph Roe attempt to escape from the American federal prison on Alcatraz Island in San Francisco Bay; neither is ever seen again.
Day of death April 15, 1952
The temperature on April 15, 1952 was between 9.9 °C and 22.3 °C and averaged 16.0 °C. There was 11.7 hours of sunshine (84%). The almost cloudless was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Rik Plomp, "Pedigree Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plomp/I5152.php : accessed January 9, 2026), "Sijtske Postema (1909-1952)".
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