The temperature on May 20, 1909 was between 5.1 °C and 21.2 °C and averaged 14.7 °C. There was 13.9 hours of sunshine (87%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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 28 » United States troops leave Cuba with the exception of Guantanamo Bay Naval Base after being there since the Spanish–American War.
February 2 » The Paris Film Congress opens. An attempt by European producers to form an equivalent to the MPCC cartel in the United States.
April 18 » Joan of Arc is beatified in Rome.
August 30 » Burgess Shale fossils are discovered by Charles Doolittle Walcott.
December 4 » The Montreal Canadiens ice hockey club, the oldest surviving professional hockey franchise in the world, is founded as a charter member of the National Hockey Association.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I118012.php : accessed October 25, 2026), "Bartele de Haan (1909-)".
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