Saint Urho's Day is a fictional holiday celebrated primarily in the United States and Canada, particularly among Finnish-American communities. It honors Saint Urho, a legendary figure said to have saved the grape crops from a plague of locusts in Finland. The day is observed on March 16th, the day before St. Patrick's Day. Festivities often include wearing purple and green, parades, and various cultural activities. People may also enjoy traditional Finnish foods and drinks. While not an official holiday, it serves as a fun way to celebrate Finnish heritage and community spirit.