The temperature on May 31, 1911 was between 14.1 °C and 26.0 °C and averaged 20.4 °C. There was 13.3 hours of sunshine (81%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
April 6 » During the Battle of Deçiq, Dedë Gjon Luli Dedvukaj, leader of the Malësori Albanians, raises the Albanian flag in the town of Tuzi, Montenegro, for the first time after George Kastrioti (Skanderbeg).
May 23 » The New York Public Library is dedicated.
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
When copying data from this family tree, please include a reference to the origin: P. Heres, "Family tree Eilander", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eilander/I1099499484.php : accessed February 23, 2026), "Geertje Olthuis (1911-1911)".
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