About October 27

October 27, 2025 is the 300th day of the year 2025 in the Gregorian calendar. There are 65 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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Scorpio is the sun sign of a person born on this day. Opal is the modern birthstone for this month. Jasper is the mystical birthstone from Tibetan origin that dates back over a thousand years.

According to the lunisolar Chinese calendar, there are 113 days remaining before the start of the next Chinese New Year.

What Happened On October 27

  • 312
    Constantine the Great is said to have received his famous Vision of the Cross.
  • 710
    Saracen invasion of Sardinia.
  • 1275
    Traditional founding of the city of Amsterdam.
  • 1553
    Condemned as a heretic, Michael Servetus is burned at the stake just outside Geneva.
  • 1644
    Second Battle of Newbury in the English Civil War.
  • 1682
    Philadelphia, Pennsylvania is founded.
  • 1795
    The United States and Spain sign the Treaty of Madrid, which establishes the boundaries between Spanish colonies and the U.S.
  • 1930
    ratifications exchanged in London, for the first London Naval Treaty signed in April modifying the 1925 Washington Naval Treaty and the arms limitation treaty’s modified provisions go into effect immediately; further limiting the expensive naval arms race between its five signatories.
  • 1944
    World War II: German forces capture Banská Bystrica during Slovak National Uprising thus bringing it to an end.
  • 1961
    Mauritania and Mongolia join the United Nations.
  • 1961
    NASA launches the first Saturn I rocket in Mission Saturn-Apollo 1.
  • 1962
    A plane carrying Enrico Mattei, post-war Italian administrator, crashes in mysterious circumstances.
  • 1967
    Catholic priest Philip Berrigan and others of the Baltimore Four protest the Vietnam War by pouring blood on Selective Service records.
  • 1973
    The Cañon City meteorite, a 1.4 kg chondrite type meteorite, strikes in Fremont County, Colorado.
  • 1981
    The Soviet submarine U 137 runs aground on the east coast of Sweden.
  • 1986
    The British government suddenly deregulates financial markets, leading to a total restructuring of the way in which they operate in the country, in an event now referred to as the Big Bang.
  • 1994
    The U.S. prison population tops 1 million for the first time in American history.
  • 1995
    Former Prime Minister of Italy Bettino Craxi is convicted in absentia of corruption.
  • 2005
    The SSETI Express micro-satellite is successfully launched from the Plesetsk Cosmodrome.
  • 2011
    The Royal Australian Navy announces that they discovered the wreck of a World War II submarine in Simpson Harbour, Papua New Guinea during Operation RENDER SAFE - it is likely to be Japanese.

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