The temperature on April 12, 1911 was between 0.6 °C and 6.6 °C and averaged 4.5 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
August 14 » United States Senate leaders agree to rotate the office of President pro tempore of the Senate among leading candidates to fill the vacancy left by William P. Frye's death.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
Day of death July 20, 1975
The temperature on July 20, 1975 was between 13.8 °C and 22.0 °C and averaged 17.4 °C. There was 2.6 mm of rain during 2.0 hours. There was 1.5 hours of sunshine (9%). The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
April 19 » India's first satellite Aryabhata launched in orbit from Kapustin Yar, Russia.
July 30 » Jimmy Hoffa disappears from the parking lot of the Machus Red Fox restaurant in Bloomfield Hills, Michigan, a suburb of Detroit, at about 2:30p.m. He is never seen or heard from again.
August 14 » The Rocky Horror Picture Show, the longest-running release in film history, opens in London.
September 5 » Sacramento, California: Lynette Fromme attempts to assassinate U.S. President Gerald Ford.
September 16 » Papua New Guinea gains independence from Australia.
December 6 » The Troubles: Fleeing from the police, a Provisional IRA unit takes a British couple hostage in their flat on Balcombe Street, London, beginning a six-day siege.
When copying data from this family tree, please include a reference to the origin: A.G. Eijssink, "Family tree Eijssink", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijssink/I2930.php : accessed January 11, 2026), "Hendrikus Lambertus Seijger (1911-1975)".
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