The temperature on July 17, 1912 was between 13.3 °C and 28.1 °C and averaged 21.6 °C. There was 11.8 hours of sunshine (73%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 23 » The International Opium Convention is signed at The Hague.
July 30 » Japan's Emperor Meiji dies and is succeeded by his son Yoshihito, who is now known as the Emperor Taishō.
September 28 » The Ulster Covenant is signed by some 500,000 Ulster Protestant Unionists in opposition to the Third Irish Home Rule Bill.
November 2 » Bulgaria defeats the Ottoman Empire in the Battle of Lule Burgas, the bloodiest battle of the First Balkan War, which opens her way to Constantinople.
December 8 » Leaders of the German Empire hold an Imperial War Council to discuss the possibility that war might break out.
December 28 » The first municipally owned streetcars take to the streets in San Francisco.
When copying data from this family tree, please include a reference to the origin: J. Ham, "Family tree Ham", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ham/I51279.php : accessed January 31, 2026), "Jacob van der Zwan (± 1887-????)".
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