The temperature on May 5, 1911 was between 0.4 °C and 16.2 °C and averaged 8.6 °C. There was 7.1 hours of sunshine (47%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
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.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 31 » The RMS Titanic is launched in Belfast, Northern Ireland.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
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: Ineke Hartman-Post, "Family tree Post - Bouwman - Koedoder - Van Zijl - Hartman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-post-bouwman-koedoder-van-zijl-hartman/I2315.php : accessed May 5, 2025), "Annigje van Woersem".
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