St. Finbarr's Day is celebrated on September 25th in honor of St. Finbarr, the patron saint of Cork, Ireland. He is known for founding the famous Cork Cathedral and is revered for his contributions to the Christian faith in the region. The day is marked by various religious observances, including special masses and prayers. In addition to its religious significance, St. Finbarr's Day is also a time for local festivities in Cork. Communities often come together to celebrate with cultural events, music, and food, reflecting the rich heritage associated with the saint and the city.