What happened on May 15 ?

Paraguay - Independence Day. Celebrations for the anniversary of the independence begin on Flag Day, 14 May.

Roman Empire - Mercuralia in honor of Mercury held.

International day of families.

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.

Slovenia - Day of Slovenian armed forces.

Teacher's Day in Mexico (Día del Maestro) and South Korea (??? ?).

Nakba Day in Palestinian communities.

Saint Achillius

Saint Gerebern

Saint Isidore the Labourer

Saint Jean-Baptiste de la Salle

Saint Reticius

Saint Denise

Saint Dymphna