May 18 » Khodynka Tragedy: A mass panic on Khodynka Field in Moscow during the festivities of the coronation of Russian Tsar Nicholas II results in the deaths of 1,389 people.
August 16 » Skookum Jim Mason, George Carmack and Dawson Charlie discover gold in a tributary of the Klondike River in Canada, setting off the Klondike Gold Rush.
August 17 » Bridget Driscoll became the first recorded case of a pedestrian killed in a collision with a motor car in the United Kingdom.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
December 17 » Pittsburgh, Pennsylvania's Schenley Park Casino, which was the first multi-purpose arena with the technology to create an artificial ice surface in North America, is destroyed in a fire.
Day of marriage August 14, 1935
The temperature on August 14, 1935 was between 11.4 °C and 17.8 °C and averaged 14.4 °C. There was 0.4 hours of sunshine (3%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 26 » Robert Watson-Watt carries out a demonstration near Daventry which leads directly to the development of radar in the United Kingdom.
May 27 » New Deal: The Supreme Court of the United States declares the National Industrial Recovery Act to be unconstitutional in A.L.A. Schechter Poultry Corp. v. United States, (295 U.S. 495).
July 28 » First flight of the Boeing B-17 Flying Fortress.
September 8 » US Senator from Louisiana Huey Long is fatally shot in the Louisiana State Capitol building.
September 17 » The Niagara Gorge Railroad ceases operations after a rockslide.
December 18 » The Lanka Sama Samaja Party is founded in Ceylon.
Day of death September 3, 1971
The temperature on September 3, 1971 was between 10.9 °C and 21.8 °C and averaged 16.9 °C. There was 4.7 hours of sunshine (35%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
August 14 » Bahrain declares independence as the State of Bahrain.
August 18 » Vietnam War: Australia and New Zealand decide to withdraw their troops from Vietnam.
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.
September 29 » Oman joins the Arab League.
December 1 » Cambodian Civil War: Khmer Rouge rebels intensify assaults on Cambodian government positions, forcing their retreat from Kompong Thmar and nearby Ba Ray.
December 16 » Bangladesh Liberation War and Indo-Pakistani War of 1971: The ceasefire of the Pakistan Army brings an end to both conflicts. This is commemorated annually as Victory Day in Bangladesh, and as Vijay Diwas in India.
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I4082.php : accessed January 10, 2026), "Wilhelmus Michiel Cornelis Wolff (1896-1971)".
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