Saint Piran's Day is celebrated on March 5th each year, honoring Saint Piran, the patron saint of Cornwall in England. The day marks the arrival of Saint Piran in Cornwall, where he is believed to have introduced Christianity to the region. Festivities often include parades, traditional music, and the display of the Cornish flag, which features a white cross on a black background. Many people enjoy local foods, such as Cornish pasties, and participate in community events to celebrate their heritage and culture.