The temperature on March 4, 1909 was between -5.2 °C and 1.8 °C and averaged -1.7 °C. There was 0.2 mm of rain. There was 0.4 hours of sunshine (4%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. 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.
February 12 » The National Association for the Advancement of Colored People (NAACP) is founded.
February 20 » Publication of the Futurist Manifesto in the French journal Le Figaro.
March 23 » Theodore Roosevelt leaves New York for a post-presidency safari in Africa. The trip is sponsored by the Smithsonian Institution and National Geographic Society.
April 14 » A massacre is organized by the Ottoman Empire against the Armenian population of Cilicia.
October 16 » William Howard Taft and Porfirio Díaz hold the first summit between a U.S. and a Mexican president. They narrowly escape assassination.
Day of death September 7, 1953
The temperature on September 7, 1953 was between 8.2 °C and 22.2 °C and averaged 15.4 °C. There was 11.6 hours of sunshine (87%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
January 5 » The play Waiting for Godot by Samuel Beckett receives its première in Paris.
January 31 » A North Sea flood causes over 1,800 deaths in the Netherlands and over 300 in the United Kingdom.
February 28 » James Watson and Francis Crick announce to friends that they have determined the chemical structure of DNA; the formal announcement takes place on April 25 following publication in April's Nature (pub. April 2).
June 18 » The Egyptian revolution of 1952 ends with the overthrow of the Muhammad Ali dynasty and the declaration of the Republic of Egypt.
June 26 » Lavrentiy Beria, head of MVD, is arrested by Nikita Khrushchev and other members of the Politburo.
November 21 » The Natural History Museum, London announces that the "Piltdown Man" skull, initially believed to be one of the most important fossilized hominid skulls ever found, is a hoax.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I487509.php : accessed February 22, 2026), "Janke Helfferich (1909-1953)".
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