The temperature on February 23, 1911 was between 6.1 °C and 9.5 °C and averaged 7.8 °C. There was 4.0 mm of rain. There was 0.6 hours of sunshine (6%). The average windspeed was 6 Bft (strong wind) and was prevailing from the southwest. Source: KNMI
May 23 » The New York Public Library is dedicated.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
December 29 » Sun Yat-sen becomes the provisional President of the Republic of China; he formally takes office on January 1, 1912.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I19333.php : accessed January 29, 2026), "Ivy Madeleine Davids (1911-)".
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