April 29 » A landslide kills 70 people in Frank, in the District of Alberta, Canada.
June 16 » Roald Amundsen leaves Oslo, Norway, to commence the first east–west navigation of the Northwest Passage.
August 18 » German engineer Karl Jatho allegedly flies his self-made, motored gliding airplane four months before the first flight of the Wright brothers.
August 29 » The Slava, the last of the five Borodino-class battleships, is launched.
October 1 » Baseball: The Boston Americans play the Pittsburgh Pirates in the first game of the modern World Series.
November 3 » With the encouragement of the United States, Panama separates from Colombia.
Day of marriage September 12, 1928
The temperature on September 12, 1928 was between 7.2 °C and 19.2 °C and averaged 12.6 °C. There was 5.9 hours of sunshine (46%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
May 3 » The Jinan incident begins with the deaths of twelve Japanese civilians by Chinese forces in Jinan, China, which leads to Japanese retaliation and the deaths of over 2,000 Chinese civilians in the following days.
September 17 » The Okeechobee hurricane strikes southeastern Florida, killing more than 2,500 people.
November 1 » The Law on the Adoption and Implementation of the Turkish Alphabet, replaces the Arabic alphabet with the Latin alphabet.
November 12 » SSVestris sinks approximately 200 miles (320km) off Hampton Roads, Virginia, killing at least 110 passengers, mostly women and children who die after the vessel is abandoned.
November 18 » Release of the animated short Steamboat Willie, the first fully synchronized sound cartoon, directed by Walt Disney and Ub Iwerks, featuring the third appearances of cartoon characters Mickey Mouse and Minnie Mouse. This is considered by the Disney corporation to be Mickey's birthday.
December 13 » George Gershwin's An American in Paris is first performed.
Day of death October 23, 1967
The temperature on October 23, 1967 was between 3.8 °C and 14.7 °C and averaged 8.3 °C. There was 0.1 mm of rain. There was 6.8 hours of sunshine (67%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
February 13 » American researchers discover the Madrid Codices by Leonardo da Vinci in the National Library of Spain.
April 24 » Vietnam War: American General William Westmoreland says in a news conference that the enemy had "gained support in the United States that gives him hope that he can win politically that which he cannot win militarily".
May 20 » The Popular Movement of the Revolution political party is established in the Democratic Republic of the Congo.
August 13 » Two young women became the first fatal victims of grizzly bear attacks in the 57-year history of Montana's Glacier National Park in separate incidents.
October 4 » Omar Ali Saifuddien III of Brunei abdicates in favour of his son.
November 11 » Vietnam War: In a propaganda ceremony in Phnom Penh, Cambodia, three American prisoners of war are released by the Viet Cong and turned over to "new left" antiwar activist Tom Hayden.
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/I4124.php : accessed February 25, 2026), "Henderika Catharina Gerarda Wolff (1903-1967)".
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