May 15th Holidays: Celebrations and Observances Worldwide

May 15th is a day filled with various holidays, celebrations, observances, and historical significance around the world. From international events to national holidays and religious commemorations and saints, this date holds special meaning for many cultures and communities. Explore the list of holidays, observances and saints celebrated on May 15th.

Holidays on May 15th

  • Paraguay - Independence Day. Celebrations for the anniversary of the independence begin on Flag Day, 14 May.
  • Nakba Day in Palestinian communities.
  • Roman Empire - Mercuralia in honor of Mercury held.
  • International day of climate changes.
  • International conscientious objectors' day.
  • Buddha's Birthday in Taiwan, Hong Kong, Macau and South Korea (2005).
  • United States - Peace Officers Memorial Day.
  • International day of families.
  • Teacher's Day in Mexico (Dfa del Maestro) and South Korea (??? ?).
  • Slovenia - Day of Slovenian armed forces.

Saints celebrated on May 15th

  • Saint Dymphna
  • Saint Achillius
  • Saint Gerebern
  • Saint Isidore the Labourer
  • Saint Jean-Baptiste de la Salle
  • Saint Reticius
  • Saint Denise