January 4 » Topsy, an elephant, is electrocuted by the owners of Luna Park, Coney Island. The Edison film company records the film Electrocuting an Elephant of Topsy's death.
March 14 » Pelican Island National Wildlife Refuge, the first national wildlife refuge in the US, is established by President Theodore Roosevelt.
June 16 » The Ford Motor Company is incorporated.
July 4 » The Philippine–American War is officially concluded.
August 2 » The Ilinden–Preobrazhenie Uprising against the Ottoman Empire begins.
October 6 » The High Court of Australia sits for the first time.
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
January 1 » Boris Bazhanov defects through Iran. He is the only assistant of Joseph Stalin's secretariat to have defected from the Eastern Bloc.
April 14 » The Bremen, a German Junkers W 33 type aircraft, reaches Greenly Island, Canada - the first successful transatlantic aeroplane flight from east to west.
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.
June 9 » Charles Kingsford Smith completes the first trans-Pacific flight in a Fokker Trimotor monoplane, the Southern Cross.
September 17 » The Okeechobee hurricane strikes southeastern Florida, killing more than 2,500 people.
October 15 » The airship, Graf Zeppelin completes its first trans-Atlantic flight, landing at Lakehurst, New Jersey, United States.
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
May 10 » The Northrop M2-F2 crashes on landing, becoming the inspiration for the novel Cyborg and TV series The Six Million Dollar Man.
May 13 » Dr. Zakir Husain becomes the third President of India. He is the first Muslim President of the Indian Union. He holds this position until August 24, 1969.
June 17 » Nuclear weapons testing: China announces a successful test of its first thermonuclear weapon.
September 11 » China's People's Liberation Army (PLA) launched an attack on Indian posts at Nathu La, Sikkim, India, which resulted a military clashes.
November 22 » UN Security Council Resolution 242 is adopted, establishing a set of the principles aimed at guiding negotiations for an Arab–Israeli peace settlement.
November 30 » Pro-Soviet communists in the Philippines establish Malayang Pagkakaisa ng Kabataan Pilipino as its new youth wing.
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 January 8, 2026), "Henderika Catharina Gerarda Wolff (1903-1967)".
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