The Ati-Atihan Festival is an annual feast celebrated in honor of the Santo Niño, concluding on the third Sunday of January, in the island and town of Kalibo, Aklan in the Philippines. Known as the "Mother of All Philippine Festivals", it is considered to be one of the liveliest festivals in the country.
The festival consists of tribal dance, music, accompanied by indigenous costumes and weapons, and parade along the street. Christians, and non-Christians observe this day with religious processions.

A 13th century (c.1200 A.D.) event explains the origins of the festival. A group of 10 Malay chieftains called Datus, fleeing from the island of Borneo settled in the Philippines, and were granted settlement by the Ati people, the tribes of Panay Island.
The Ati-Atihan was originally a pagan festival from this tribe practicing Animism, and their worshiping their anito god. Spanish missionaries gradually added a Christian meaning. Today, the Ati-Atihan is celebrated as a religious festival.