This ancient tradition is commonly practiced along Vietnam's central and southern coasts and originates from the custom of worshipping the Whale Saint who safeguards fishermen. The festival is held whenever fishermen begin a new fishing season to pray for plentiful catches, safe expeditions, and peace for the nation. The festival, held annually in Phu Yen Province, preserves rituals such as the procession of the feudal title and a ceremony to honour the Whale Saint.