List of Teachers' Days

Teachers' Day (Colombia, Mexico, and South Korea)

Public holidays in Lithuania

Republic Day (Lithuania)

Peace Officers Memorial Day

Peace Officers Memorial Day (United States)

Nakba Day

Nakba Day (Palestinian communities)

Mother's Day

Mother's Day (Paraguay)

Saint Ubaldo Day

La Corsa dei Ceri begins on the eve of the feast day of Saint Ubaldo. (Gubbio)

International Day of Families

International Day of Families (International)

Conscientious objector

International Conscientious Objectors Day

Public holidays in Lithuania

Constituent Assembly Day (Lithuania)

May 15 (Eastern Orthodox liturgics)

Christian feast day:
May 15 (Eastern Orthodox liturgical calendar)

Sophia of Rome

Christian feast day:
Sophia of Rome (Roman Catholic church)

Reticius

Christian feast day:
Reticius (Roman Catholic Church)

Peter, Andrew, Paul, and Denise

Christian feast day:
Peter, Andrew, Paul, and Denise (Roman Catholic Church)

Kaleb of Axum

Christian feast day:
Kaleb of Axum

Jean-Baptiste de La Salle

Christian feast day:
Jean-Baptiste de La Salle (Roman Catholic Church)