January 1 » New York, New York annexes land from surrounding counties, creating the City of Greater New York. The four initial boroughs, Manhattan, Brooklyn, Queens, and The Bronx, are joined on January 25 by Staten Island to create the modern city of five boroughs.
February 23 » Émile Zola is imprisoned in France after writing J'Accuse…!, a letter accusing the French government of antisemitism and wrongfully imprisoning Captain Alfred Dreyfus.
June 21 » The United States captures Guam from Spain. The few warning shots fired by the U.S. naval vessels are misinterpreted as salutes by the Spanish garrison, which was unaware that the two nations were at war.
August 11 » Spanish–American War: American troops enter the city of Mayagüez, Puerto Rico.
September 13 » Hannibal Goodwin patents celluloid photographic film.
December 26 » Marie and Pierre Curie announce the isolation of radium.
Day of death October 10, 1911
The temperature on October 10, 1911 was between 3.5 °C and 13.8 °C and averaged 8.7 °C. There was 8.5 hours of sunshine (77%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
May 15 » More than 300 Chinese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Emilio Madero take the city of Torreón from the Federales.
July 24 » Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas".
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
December 27 » "Jana Gana Mana", the national anthem of India, is first sung in the Calcutta Session of the Indian National Congress.
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/I119248.php : accessed December 29, 2025), "Willem de Haan (1898-1911)".
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