The temperature on March 18, 1909 was between -3.4 °C and 9.1 °C and averaged 2.9 °C. There was 6.2 hours of sunshine (52%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
February 15 » The Flores Theater fire in Acapulco, Mexico kills 250.
February 20 » Publication of the Futurist Manifesto in the French journal Le Figaro.
April 13 » The military of the Ottoman Empire reverses the Ottoman countercoup of 1909 to force the overthrow of Sultan Abdul Hamid II.
May 31 » The National Negro Committee, forerunner to the National Association for the Advancement of Colored People (NAACP), convenes for the first time.
July 16 » Persian Constitutional Revolution: Mohammad Ali Shah Qajar is forced out as Shah of Persia and is replaced by his son Ahmad Shah Qajar.
August 24 » Workers start pouring concrete for the Panama Canal.
Day of death August 4, 1911
The temperature on August 4, 1911 was between 11.4 °C and 22.6 °C and averaged 17.4 °C. There was 2.5 mm of rain. There was 9.0 hours of sunshine (59%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
January 14 » Roald Amundsen's South Pole expedition makes landfall on the eastern edge of the Ross Ice Shelf.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
June 22 » Mexican Revolution: Government forces bring an end to the Magonista rebellion of 1911 in the Second Battle of Tijuana.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
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/I117938.php : accessed January 3, 2026), "Jilline Keizer (1909-1911)".
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