The temperature on December 29, 1912 was between 5.3 °C and 10.9 °C and averaged 8.3 °C. There was 2.9 mm of rain. There was -0.1 hours of sunshine (0%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-southwest. Source: KNMI
January 6 » German geophysicist Alfred Wegener first presents his theory of continental drift.
February 14 » Arizona is admitted as the 48th and the last contiguous U.S. state.
March 12 » The Girl Guides (later renamed the Girl Scouts of the USA) are founded in the United States.
April 17 » Russian troops open fire on striking goldfield workers in northeast Siberia, killing at least 150.
November 7 » The Deutsche Opernhaus (now Deutsche Oper Berlin) opens in the Berlin neighborhood of Charlottenburg, with a production of Beethoven's Fidelio.
November 28 » Albania declares its independence from the Ottoman Empire.
When copying data from this family tree, please include a reference to the origin: John C. Sweep, "Family tree Sweep", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-sweep/R90.php : accessed January 14, 2026), "Johanna Mathea de Wildt (1883-1912)".
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