January 13 » First Italo-Ethiopian War: the war's opening battle, the Battle of Coatit, occurs; it is an Italian victory.
April 8 » In Pollock v. Farmers' Loan & Trust Co. the Supreme Court of the United States declares unapportioned income tax to be unconstitutional.
May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
June 11 » Paris–Bordeaux–Paris, sometimes called the first automobile race in history or the "first motor race", takes place.
June 28 » The United States Court of Private Land Claims rules James Reavis’s claim to Barony of Arizona is "wholly fictitious and fraudulent."
August 31 » German Count Ferdinand von Zeppelin patents his navigable balloon.
Day of marriage April 30, 1926
The temperature on April 30, 1926 was between 11.8 °C and 19.2 °C and averaged 14.8 °C. There was 0.2 mm of rain. There was -0.1 hours of sunshine (0%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
January 8 » Abdul-Aziz ibn Saud is crowned King of Hejaz.
April 21 » Al-Baqi cemetery, former site of the mausoleum of four Shi'a Imams, is leveled to the ground by Wahhabis.
April 24 » The Treaty of Berlin is signed. Germany and the Soviet Union each pledge neutrality in the event of an attack on the other by a third party for the next five years.
June 28 » Mercedes-Benz is formed by Gottlieb Daimler and Karl Benz merging their two companies.
August 20 » Japan's public broadcasting company, Nippon Hōsō Kyōkai (NHK) is established.
September 8 » Germany is admitted to the League of Nations.
Day of death January 24, 1968
The temperature on January 24, 1968 was between 1.2 °C and 4.6 °C and averaged 3.1 °C. There was 1.9 mm of rain during 1.2 hours. There was 2.9 hours of sunshine (34%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
May 25 » The Gateway Arch in St. Louis, Missouri, is dedicated.
July 20 » The first International Special Olympics Summer Games are held at Soldier Field in Chicago, with about 1,000 athletes with intellectual disabilities.
August 21 » James Anderson Jr. posthumously receives the first Medal of Honor to be awarded to an African American U.S. Marine.
September 15 » The Soviet Zond 5 spaceship is launched, becoming the first spacecraft to fly around the Moon and re-enter the Earth's atmosphere.
December 9 » Douglas Engelbart gave what became known as "The Mother of All Demos", publicly debuting the computer mouse, hypertext, and the bit-mapped graphical user interface using the oN-Line System (NLS).
December 26 » The Communist Party of the Philippines is established by Jose Maria Sison, breaking away from the Partido Komunista ng Pilipinas-1930.
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/I212474.php : accessed October 22, 2026), "Pieter Berend Wiersum (1895-1968)".
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