The temperature on November 25, 1911 was between -2.3 °C and 2.8 °C and averaged 0.1 °C. There was 0.2 hours of sunshine (2%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
When copying data from this family tree, please include a reference to the origin: Louis Kramer, "Kramer Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/kramer_stamboom/I588711.php : accessed February 3, 2026), "Sijtske Johannes de vries (1911-)".
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