July 1 » Spanish–American War: The Battle of San Juan Hill is fought in Santiago de Cuba, Cuba.
August 23 » The Southern Cross Expedition, the first British venture of the Heroic Age of Antarctic Exploration, departs from London.
September 13 » Hannibal Goodwin patents celluloid photographic film.
September 18 » The Fashoda Incident triggers the last war scare between Britain and France.
October 14 » The steam ship SSMohegan sinks near the Lizard peninsula, Cornwall, killing 106.
November 3 » France withdraws its troops from Fashoda (now in Sudan), ending the Fashoda Incident.
Day of marriage June 30, 1917
The temperature on June 30, 1917 was between 13.6 °C and 17.2 °C and averaged 15.0 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. 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.
May 18 » World War I: The Selective Service Act of 1917 is passed, giving the President of the United States the power of conscription.
June 4 » The first Pulitzer Prizes are awarded: Laura E. Richards, Maude H. Elliott, and Florence Hall receive the first Pulitzer for biography (for Julia Ward Howe). Jean Jules Jusserand receives the first Pulitzer for history for his work With Americans of Past and Present Days. Herbert B. Swope receives the first Pulitzer for journalism for his work for the New York World.
August 30 » Vietnamese prison guards led by Trịnh Văn Cấn mutiny at the Thái Nguyên penitentiary against local French authority.
November 24 » In Milwaukee, nine members of the Milwaukee Police Department are killed by a bomb, the most deaths in a single event in U.S. police history until the September 11 attacks in 2001.
When copying data from this family tree, please include a reference to the origin: Dirk Zwinderman, "Family tree Zwinderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-zwinderman/I1744.php : accessed February 15, 2026), "Hommo Hartenhof (1898-????)".
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