About December 1

December 1, 2025 is the 335th day of the year 2025 in the Gregorian calendar. There are 30 days remaining until the end of this year. The day of the week is Monday.

You can browse the full year calendar in case you need it.

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Sagittarius is the sun sign of a person born on this day. Turquoise is the modern birthstone for this month. Onyx is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 78 days remaining before the start of the next Chinese New Year.

What Happened On December 1

  • 800
    Charlemagne judges the accusations against Pope Leo III in the Vatican.
  • 1822
    Peter I is crowned Emperor of Brazil.
  • 1834
    Slavery is abolished in the Cape Colony in accordance with the Slavery Abolition Act 1833.
  • 1885
    First serving of the soft drink Dr Pepper at a drug store in Waco, Texas (United States).
  • 1918
    The Kingdom of Serbs, Croats and Slovenes (later known as the Kingdom of Yugoslavia) is proclaimed.
  • 1925
    World War I aftermath: The final Locarno Treaty is signed in London, establishing post-war territorial settlements.
  • 1941
    World War II: Fiorello La Guardia, Mayor of New York City and Director of the Office of Civilian Defense, signs Administrative Order 9, creating the Civil Air Patrol.
  • 1948
    Taman Shud Case: The body of an unidentified man is found in Adelaide, Australia; involving an undetectable poison and a secret code in a very rare book, the case remains unsolved and is “one of Australia’s most profound mysteries”.
  • 1952
    The New York Daily News reports the news of Christine Jorgenson, the first notable case of sexual reassignment surgery.
  • 1958
    The Our Lady of the Angels School fire in Chicago, Illinois, kills 92 children and three nuns.
  • 1959
    Cold War: Opening date for signature of the Antarctic Treaty, which sets aside Antarctica as a scientific preserve and bans military activity on the continent.
  • 1963
    Nagaland becomes the 16th state of India.
  • 1965
    The Border Security Force is formed in India as a special force to guard the borders.
  • 1969
    The first legislation to limit aircraft noise levels at airports is introduced in U.S. Federal Air Regulation, Part 36.
  • 1971
    Cambodian Civil War: Khmer Rouge rebels intensify assaults on Cambodian government positions, forcing their retreat from Kompong Thmar and nearby Ba Ray.
  • 1973
    Papua New Guinea gains self government from Australia.
  • 1974
    Northwest Orient Airlines Flight 6231, crashes northwest of John F. Kennedy International Airport.
  • 1974
    TWA Flight 514, a Boeing 727, crashes northwest of Dulles International Airport killing all 92 people on board.
  • 1988
    Benazir Bhutto is appointed Prime Minister of Pakistan.
  • 2009
    The Treaty of Lisbon, which amends the Treaty on European Union and the Treaty establishing the European Community, which together comprise the constitutional basis of European Union, comes into effect.

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