Opol Day, or Araw ng Opol, is observed in the municipality of Opol in the Philippines every June 15. This special non-working holiday commemorates the official founding of Opol in 1950. The municipality, located in Misamis Oriental, has a population of over 66,000 and derives its name from the Visayan word "opo," referring to the white gourd, a historically significant crop in the area. The history of Opol is closely linked to Cagayan de Oro, from which it was separated, and reflects a rich cultural tapestry influenced by the local Higaonon people, early Visayan settlers from Bohol, and later Spanish colonizers. The town's economy is based on farming, commercial fishing, light industry, and tourism. Celebrations typically include local events that honor the municipality's heritage and community spirit.