April 25 » Spanish–American War: The United States declares war on Spain.
June 17 » The United States Navy Hospital Corps is established.
October 6 » Phi Mu Alpha Sinfonia, the largest American music fraternity, is founded at the New England Conservatory of Music.
December 3 » The Duquesne Country and Athletic Club defeated an all-star collection of early football players 16–0, in what is considered to be the very first all-star game for professional American football.
December 18 » Gaston de Chasseloup-Laubat sets the first officially recognized land speed record of 39.245mph (63.159km/h) in a Jeantaud electric car.
December 26 » Marie and Pierre Curie announce the isolation of radium.
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.
March 11 » Vietnam War: North Vietnamese and Viet Cong guerrilla forces establish control over Buôn Ma Thuột commune from the South Vietnamese army.
April 25 » As North Vietnamese forces close in on the South Vietnamese capital Saigon, the Australian Embassy is closed and evacuated, almost ten years to the day since the first Australian troop commitment to South Vietnam.
August 14 » The Rocky Horror Picture Show, the longest-running release in film history, opens in London.
August 15 » Takeo Miki makes the first official pilgrimage to Yasukuni Shrine by an incumbent prime minister on the anniversary of the end of World War II.
September 8 » Gays in the military: US Air Force Tech Sergeant Leonard Matlovich, a decorated veteran of the Vietnam War, appears in his Air Force uniform on the cover of Time magazine with the headline "I Am A Homosexual". He is given a general discharge, later upgraded to honorable.
November 14 » With the signing of the Madrid Accords, Spain abandons Western Sahara.
When copying data from this family tree, please include a reference to the origin: Tjitze Koster, "Family tree Koster Twijslerheide e.o.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koster/I6840.php : accessed February 4, 2026), "Berend van der Berg (1898-1975)".
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