About May 18

May 18, 2025 is the 138th day of the year 2025 in the Gregorian calendar. There are 227 days remaining until the end of this year. The day of the week is Sunday.

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

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

According to the lunisolar Chinese calendar, there are 275 days remaining before the start of the next Chinese New Year.

What Happened On May 18

  • 332
    Constantine the Great announced free distributions of food to the citizens in Constantinople.
  • 1152
    Henry II of England marries Eleanor of Aquitaine.
  • 1268
    The Principality of Antioch, a crusader state, falls to the Mamluk Sultan Baibars in the Battle of Antioch.
  • 1498
    Vasco da Gama reaches the port of Calicut, India.
  • 1593
    Playwright Thomas Kyd’s accusations of heresy lead to an arrest warrant for Christopher Marlowe.
  • 1763
    Fire destroys a large part of Montreal, Quebec.
  • 1803
    Napoleonic Wars: The United Kingdom revokes the Treaty of Amiens and declares war on France.
  • 1811
    Battle of Las Piedras: The first great military triumph of the revolution of the Río de la Plata in Uruguay led by Jose Artigas.
  • 1812
    John Bellingham is found guilty and sentenced to death by hanging for the assassination of British Prime Minister Spencer Perceval.
  • 1863
    American Civil War: The Siege of Vicksburg begins.
  • 1896
    Khodynka Tragedy: A mass panic on Khodynka Field in Moscow during the festivities of the coronation of Russian Tsar Nicholas II results in the deaths of 1,389 people.
  • 1910
    The Earth passes through the tail of Comet Halley.
  • 1917
    World War I: The Selective Service Act of 1917 is passed, giving the President of the United States the power of conscription.
  • 1933
    New Deal: President Franklin D. Roosevelt signs an act creating the Tennessee Valley Authority.
  • 1944
    World War II: Battle of Monte Cassino – Conclusion after seven days of the fourth battle as German paratroopers evacuate Monte Cassino.
  • 1953
    Jackie Cochran becomes the first woman to break the sound barrier.
  • 1974
    Completion of the Warsaw radio mast, the tallest construction ever built at the time. It collapsed on August 8, 1991.
  • 1991
    Northern Somalia declares independence from the rest of Somalia as the Republic of Somaliland but is not recognized by the international community.
  • 2005
    A second photo from the Hubble Space Telescope confirms that Pluto has two additional moons: Nix and Hydra.
  • 2009
    Sri Lankan Civil War: The LTTE are defeated by the Sri Lankan government, ending almost 26 years of fighting between the two sides.

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