What happened on May 10 ?

Akshaya Tritya in Hinduism.

Astronomy Day in the United States.

Birds' and Trees' Day in Hungary

Buddha's Birthday in Hong Kong, Macau, Taiwan, and South Korea.

Celebration of the Clandestine Retreat of Ma'at and Ra in Ancient Egypt.

Confederate Memorial Day in North Carolina and South Carolina.

Constitution Day in the Federated States of Micronesia.

Inauguration Day in South Africa.

Mania (mythology) in Ancient Rome.

The marriage of Shiva to Meenakshi in Madurai, India

Mother's Day in the United States, South America, India, Mexico, Oman, Pakistan, and Qatar.

National Holiday of Israel

Native American Day among Indigenous North Americans.

Parent's Day in South Korea.

The first possible day on which Pentecost may fall.

The Ploughing Ceremony in Thailand.

Tin Hau's Day in China.

Start of Tori no Mawari/Bird Week in Japan.

Tritopatores in Ancient Greece.

Saint Alphius

Saint Antoninus of Florence (died 1459)

Saint Aurelian

Saint Calepodius

Saint Cataldus

Saint Comgall

Saint Dioscorides

Saint Epimachus

Saint Francis of Assisi

Saint Gordianus

Saint Isidore the Laborer

Saint John of Avila

Saint Job

Saint Quaratus and Quintus

Saint Peter Van

Saint William of Pontoise

Saint Solange

Memorial Day of Blessed Damien of Moloka'i