The temperature on September 14, 1909 was between 10.7 °C and 17.0 °C and averaged 13.8 °C. There was 5.8 hours of sunshine (45%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
February 12 » The National Association for the Advancement of Colored People (NAACP) is founded.
February 15 » The Flores Theater fire in Acapulco, Mexico kills 250.
February 26 » Kinemacolor, the first successful color motion picture process, is first shown to the general public at the Palace Theatre in London.
March 23 » Theodore Roosevelt leaves New York for a post-presidency safari in Africa. The trip is sponsored by the Smithsonian Institution and National Geographic Society.
September 20 » The South Africa Act 1909 creates the Union of South Africa from the British Colonies from four smaller colonies.
September 23 » The novel Le Fantôme de l'Opéra (The Phantom of the Opera), by Gaston Leroux, is published as a serialization in Le Gaulois.
Day of marriage December 18, 1934
The temperature on December 18, 1934 was between 2.8 °C and 7.9 °C and averaged 5.4 °C. There was 12.5 mm of rain during 4.2 hours. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
January 1 » A "Law for the Prevention of Genetically Diseased Offspring" comes into effect in Nazi Germany.
February 16 » The Austrian Civil War ends with the defeat of the Social Democrats and the Republikanischer Schutzbund.
July 5 » "Bloody Thursday": Police open fire on striking longshoremen in San Francisco.
September 8 » Off the New Jersey coast, a fire aboard the passenger liner SSMorro Castle kills 137 people.
October 16 » Chinese Communists begin the Long March to escape Nationalist encirclement.
December 29 » Japan renounces the Washington Naval Treaty of 1922 and the London Naval Treaty of 1930.
Day of death September 12, 1974
The temperature on September 12, 1974 was between 10.1 °C and 22.6 °C and averaged 16.5 °C. There was 1.9 mm of rain during 2.3 hours. There was 3.7 hours of sunshine (29%). The partly or heavily clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the south east. 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.
June 1 » The Heimlich maneuver for rescuing choking victims is published in the journal Emergency Medicine.
September 12 » Emperor Haile Selassie of Ethiopia, 'Messiah' of the Rastafari movement, is deposed following a military coup by the Derg, ending a reign of 58 years.
September 17 » Bangladesh, Grenada and Guinea-Bissau join the United Nations.
November 24 » Donald Johanson and Tom Gray discover the 40% complete Australopithecus afarensis skeleton, nicknamed "Lucy" (after The Beatles song "Lucy in the Sky with Diamonds"), in the Awash Valley of Ethiopia's Afar Depression.
December 1 » TWA Flight 514, a Boeing 727, crashes northwest of Dulles International Airport, killing all 92 people on board.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I19560.php : accessed February 25, 2026), "Johannes Gerhardus Ehlers (1909-1974)".
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