January 17 » El Yunque National Forest in Puerto Rico becomes part of the United States National Forest System as the Luquillo Forest Reserve.
April 26 » Atlético Madrid Association football club is founded
July 4 » The Philippine–American War is officially concluded.
September 27 » The Wreck of the Old 97, an American rail disaster that became the subject of a popular ballad.
November 17 » The Russian Social Democratic Labour Party splits into two groups: The Bolsheviks (Russian for "majority") and Mensheviks (Russian for "minority").
December 14 » The Wright brothers make their first attempt to fly with the Wright Flyer at Kitty Hawk, North Carolina.
Day of death April 23, 1975
The temperature on April 23, 1975 was between 6.9 °C and 13.1 °C and averaged 9.5 °C. There was 0.1 hours of sunshine (1%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
January 8 » Ella T. Grasso becomes Governor of Connecticut, the first woman to serve as a Governor in the United States other than by succeeding her husband.
July 5 » Cape Verde gains its independence from Portugal.
August 27 » The Governor of Portuguese Timor abandons its capital, Dili, and flees to Atauro Island, leaving control to a rebel group.
October 16 » Three-year-old Rahima Banu, from Bangladesh, is the last known case of naturally occurring smallpox.
November 3 » Syed Nazrul Islam, A. H. M. Qamaruzzaman, Tajuddin Ahmad, and Muhammad Mansur Ali, Bangladeshi politicians and Sheikh Mujibur Rahman loyalists, are murdered in the Dhaka Central Jail.
December 6 » The Troubles: Fleeing from the police, a Provisional IRA unit takes a British couple hostage in their flat on Balcombe Street, London, beginning a six-day siege.
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/I131871.php : accessed October 16, 2026), "Sjouke Sipma (1903-1975)".
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