January 4 » Utah is admitted as the 45th U.S. state.
March 1 » Henri Becquerel discovers radioactive decay.
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.
June 4 » Henry Ford completes the Ford Quadricycle, his first gasoline-powered automobile, and gives it a successful test run.
June 28 » An explosion in the Newton Coal Company's Twin Shaft Mine in Pittston, Pennsylvania results in a massive cave-in that kills 58 miners.
November 17 » The Western Pennsylvania Hockey League, which later became the first ice hockey league to openly trade and hire players, began play at Pittsburgh's Schenley Park Casino.
Day of death June 22, 1968
The temperature on June 22, 1968 was between 11.2 °C and 17.5 °C and averaged 14.8 °C. There was 0.9 hours of sunshine (5%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 21 » Vietnam War: Battle of Khe Sanh: One of the most publicized and controversial battles of the war begins.
May 26 » H-dagurinn in Iceland: Traffic changes from driving on the left to driving on the right overnight
November 17 » Viewers of the Raiders–Jets football game in the eastern United States are denied the opportunity to watch its exciting finish when NBC broadcasts Heidi instead, prompting changes to sports broadcasting in the U.S.
December 21 » Apollo program: Apollo 8 is launched from the Kennedy Space Center, placing its crew on a lunar trajectory for the first visit to another celestial body by humans.
December 22 » Cultural Revolution: People's Daily posted the instructions of Mao Zedong that "The intellectual youth must go to the country, and will be educated from living in rural poverty."
December 27 » Apollo program: Apollo 8 splashes down in the Pacific Ocean, ending the first orbital manned mission to the Moon.
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/I108689.php : accessed October 19, 2026), "Jelle van der Zwaag (1896-1968)".
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