Why do think we celebrate festivals in the Philippines?
Bawal nonsense.
Nonsense = Report

Why festivals are celebrated in the Philippines? A: Philippine festivals are way to promote each province's patron saint or most known products. For religious festival in the Philippines, Filipinos express their gratitude to the patron saints for bountiful blessings.
Answer: Tradition
Explanation: It's not because it's required, mostly because we have been doing it for decades or even centuries! If we follow a religion, then we should follow/celebrate festivals as well.