About September 13

September 13, 2025 is the 256th day of the year 2025 in the Gregorian calendar. There are 109 days remaining until the end of this year. The day of the week is Saturday.

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

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

According to the lunisolar Chinese calendar, there are 157 days remaining before the start of the next Chinese New Year.

What Happened On September 13

  • 509 BC
    The Temple of Jupiter Optimus Maximus on Rome’s Capitoline Hill is dedicated on the ides of September.
  • 335
    Emperor Constantine the Great consecrated the Church of the Holy Sepulchre in Jerusalem.
  • 1213
    End of Battle of Muret, during the Albigensian Crusade to destroy the Cathar heresy.
  • 1504
    Queen Isabella and King Ferdinand issue a Royal Warrant for the construction of a Royal Chapel (Capilla Real) to be built.
  • 1743
    Great Britain, Austria and Savoy-Sardinia sign the Treaty of Worms.
  • 1759
    Battle of the Plains of Abraham: British defeat French near Quebec City in the Seven Years’ War, known in the United States as the French and Indian War.
  • 1862
    American Civil War: Union soldiers find a copy of Robert E. Lee’s battle plans in a field outside Frederick, Maryland. It is the prelude to the Battle of Antietam.
  • 1899
    Mackinder, Ollier and Brocherel make the first ascent of Batian (5,199 m – 17,058 ft), the highest peak of Mount Kenya.
  • 1906
    First flight of a fixed-wing aircraft in Europe.
  • 1914
    World War I: The Battle of Aisne begins between Germany and France.
  • 1922
    The temperature at 'Aziziya, Libya reaches a world record 57.8 °C.
  • 1935
    Rockslide near Whirlpool Rapids Bridge ends the International Railway (New York – Ontario).
  • 1948
    Deputy Primer Minister of India Vallabhbhai Patel ordered the Army to move into the Hyderabad to integrate it with Indian Union.
  • 1953
    Nikita Khrushchev is appointed secretary-general of the Communist Party of the Soviet Union.
  • 1956
    IBM introduces the first computer disk storage unit, the RAMAC 305.
  • 1971
    People’s Republic of China: Chairman Mao Zedong’s second in command and successor Marshal Lin Biao flees the country via plane after the failure of alleged coup against Mao. The plane crashes in Mongolia, killing all aboard.
  • 1971
    State police and National Guardsmen storm New York’s Attica Prison to end a prison revolt.
  • 1988
    Hurricane Gilbert is the strongest recorded hurricane in the Western Hemisphere, later replaced by Hurricane Wilma in 2005 (based on barometric pressure).
  • 2001
    Civilian aircraft traffic resumes in the U.S. after the September 11, 2001 attacks.
  • 2007
    The Declaration on the Rights of Indigenous Peoples is adopted by the United Nations General Assembly.

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