May 26 » Nicholas II becomes the last Tsar of Imperial Russia.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
June 15 » The deadliest tsunami in Japan's history kills more than 22,000 people.
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 1 » A picture showing the bare breasts of a woman appears in National Geographic magazine for the first time.
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 May 4, 1971
The temperature on May 4, 1971 was between 2.3 °C and 18.5 °C and averaged 12.2 °C. There was 8.5 hours of sunshine (56%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
February 21 » The Convention on Psychotropic Substances is signed at Vienna.
April 5 » In Sri Lanka, Janatha Vimukthi Peramuna launches a revolt against the United Front government of Sirimavo Bandaranaike.
May 30 » Mariner program: Mariner 9 is launched to map 70% of the surface, and to study temporal changes in the atmosphere and surface, of Mars.
June 7 » The United States Supreme Court overturns the conviction of Paul Cohen for disturbing the peace, setting the precedent that vulgar writing is protected under the First Amendment to the United States Constitution.
September 20 » Having weakened after making landfall in Nicaragua the previous day, Hurricane Irene regains enough strength to be renamed Hurricane Olivia, making it the first known hurricane to cross from the Atlantic Ocean into the Pacific.
November 24 » During a severe thunderstorm over Washington state, a hijacker calling himself Dan Cooper (aka D. B. Cooper) parachutes from a Northwest Orient Airlines plane with $200,000 in ransom money. He has never been found.
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/I108517.php : accessed October 23, 2026), "Aris Dreyer (1896-1971)".
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