About May 15

May 15, 2025 is the 135th day of the year 2025 in the Gregorian calendar. There are 230 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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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 278 days remaining before the start of the next Chinese New Year.

What Happened On May 15

  • 392
    Emperor Valentinian II is assassinated while advancing into Gaul against the Frankish usurper Arbogast. He is found hanging in his residence at Vienne.
  • 1525
    The battle of Frankenhausen ends the German Peasants’ War.
  • 1567
    Mary, Queen of Scots, marries James Hepburn, 4th Earl of Bothwell, her third husband.
  • 1701
    The War of the Spanish Succession begins.
  • 1755
    Laredo, Texas is established by the Spaniards.
  • 1817
    Opening of the first private mental health hospital in the United States, the Asylum for the Relief of Persons Deprived of the Use of Their Reason (now Friends Hospital) in Philadelphia, Pennsylvania.
  • 1891
    Pope Leo XIII defends workers’ rights and property rights in the encyclical Rerum Novarum, the beginning of modern Catholic social teaching.
  • 1911
    In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an “unreasonable” monopoly under the Sherman Antitrust Act and orders the company to be broken up.
  • 1919
    The Winnipeg General Strike begins. By 11:00 am, almost the whole working population of Winnipeg, Manitoba had walked off the job.
  • 1934
    Kārlis Ulmanis establishes an authoritarian government in Latvia.
  • 1936
    Amy Johnson arrives back in England after a record-breaking return flight to Cape Town
  • 1940
    McDonald’s opens its first restaurant in San Bernardino, California.
  • 1943
    Joseph Stalin dissolves the Comintern (or Third International).
  • 1957
    At Malden Island in the Pacific, Britain tests its first hydrogen bomb in Operation Grapple. The device fails to detonate properly.
  • 1970
    Philip Lafayette Gibbs and James Earl Green are killed at Jackson State University by police during student protests.
  • 1970
    President Richard Nixon appoints Anna Mae Hays and Elizabeth P. Hoisington the first female United States Army Generals.
  • 1972
    The island of Okinawa, under U.S. military governance since its conquest in 1945, reverts to Japanese control.
  • 1990
    Portrait of Doctor Gachet by Vincent van Gogh is sold for a record $82.5 million, the most expensive painting at the time.
  • 1997
    The United States government acknowledges the existence of the “Secret War” in Laos and dedicates the Laos Memorial in honor of Hmong and other “Secret War” veterans.
  • 2008
    California becomes the second U.S. state after Massachusetts in 2004 to legalize same-sex marriage after the state’s own Supreme Court rules a previous ban unconstitutional.

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