About September 18

September 18, 2025 is the 261st day of the year 2025 in the Gregorian calendar. There are 104 days remaining until the end of this year. The day of the week is Thursday.

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 152 days remaining before the start of the next Chinese New Year.

What Happened On September 18

  • 1679
    New Hampshire becomes a county of the Massachusetts Bay Colony.
  • 1739
    The Treaty of Belgrade is signed, ceding Belgrade to the Ottoman Empire.
  • 1809
    The Royal Opera House in London opens.
  • 1837
    Tiffany and Co. (first named Tiffany & Young) is founded by Charles Lewis Tiffany and Teddy Young in New York City. The store is called a “stationery and fancy goods emporium”.
  • 1851
    First publication of The New-York Daily Times, which later becomes The New York Times.
  • 1870
    Old Faithful Geyser is observed and named by Henry D. Washburn during the Washburn-Langford-Doane Expedition to Yellowstone.
  • 1885
    Riots break out in Montreal to protest against compulsory smallpox vaccination.
  • 1895
    Booker T. Washington delivers the “Atlanta Compromise” address.
  • 1895
    Daniel David Palmer gives the first chiropractic adjustment.
  • 1914
    World War I: South African troops land in German South West Africa.
  • 1919
    Fritz Pollard becomes the first African-American to play professional football for a major team, the Akron Pros.
  • 1922
    Hungary is admitted to League of Nations.
  • 1931
    The Mukden Incident gives Japan the pretext to invade and occupy Manchuria.
  • 1948
    Margaret Chase Smith of Maine becomes the first woman elected to the US Senate without completing another senator’s term, when she defeats Democratic opponent Adrian Scolten.
  • 1960
    Fidel Castro arrives in New York City as the head of the Cuban delegation to the United Nations.
  • 1961
    U.N. Secretary-General Dag Hammarskjöld dies in a plane crash while attempting to negotiate peace in the war-torn Katanga region of the Democratic Republic of the Congo.
  • 1977
    Voyager I takes first photograph of the Earth and the Moon together.
  • 1981
    Assemblée Nationale votes to abolish capital punishment in France.
  • 1997
    United States media magnate Ted Turner donates USD 1 billion to the United Nations.
  • 2007
    Pervez Musharraf announces that he will step down as army chief and restore civilian rule to Pakistan, but only after he is re-elected president.

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