January 22 » The United Mine Workers of America is founded in Columbus, Ohio.
April 7 » Completion of the first Lake Biwa Canal.
June 1 » The United States Census Bureau begins using Herman Hollerith's tabulating machine to count census returns.
September 12 » Salisbury, Rhodesia, is founded.
October 11 » In Washington, D.C., the Daughters of the American Revolution is founded.
November 29 » The Meiji Constitution goes into effect in Japan, and the first Diet convenes.
Day of marriage May 17, 1915
The temperature on May 17, 1915 was between 4.6 °C and 18.8 °C and averaged 12.3 °C. There was 2.5 mm of rain. There was 3.8 hours of sunshine (24%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
January 13 » The 6.7 Mw Avezzano earthquake shakes the Province of L'Aquila in Italy with a maximum Mercalli intensity of XI (Extreme), killing between 29,978–32,610.
January 22 » Over 600 people are killed in Guadalajara, Mexico, when a train plunges off the tracks into a deep canyon.
April 22 » The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres.
May 23 » World War I: Italy joins the Allies, fulfilling its part of the Treaty of London.
June 21 » The U.S. Supreme Court hands down its decision in Guinn v. United States 238 US 347 1915, striking down Oklahoma grandfather clause legislation which had the effect of denying the right to vote to blacks.
December 20 » World War I: The last Australian troops are evacuated from Gallipoli.
Day of death January 3, 1971
The average temperature on January 3, 1971 was -2.0 °C. There was 0.2 mm of rain. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
January 31 » The Winter Soldier Investigation, organized by the Vietnam Veterans Against the War to publicize war crimes and atrocities by Americans and allies in Vietnam, begins in Detroit.
February 2 » Idi Amin replaces President Milton Obote as leader of Uganda.
July 15 » The United Red Army is founded in Japan.
September 13 » Chairman Mao Zedong's second in command and successor Marshal Lin Biao flees the People's Republic of China after the failure of an alleged coup. His plane crashes in Mongolia, killing all aboard.
November 28 » Fred Quilt, a leader of the Tsilhqot'in First Nation suffers severe abdominal injuries allegedly caused by Royal Canadian Mounted Police officers; he dies two days later.
November 28 » Wasfi al-Tal, Prime Minister of Jordan, is assassinated by the Black September unit of the Palestine Liberation Organization.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I202755.php : accessed December 31, 2025), "Onne Hoekzema (1890-1971)".
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