St Piran's Day is celebrated on March 5th in Cornwall, England, to honor the patron saint of the region. St Piran is known for bringing Christianity to Cornwall and is often associated with the mining industry, particularly tin mining. The day is marked by various festivities, including parades, music, and traditional Cornish food. The celebration features the iconic black and white flag of St Piran, symbolizing the tin that the saint discovered. Communities across Cornwall come together to celebrate their heritage, showcasing local culture and pride through events that highlight the unique history of the region.