St. Patrick's Day Kids Crafts and St. Patrick's Day Preschool Activities. St. Patricks Day is celebrated each year on March 17th. On St. Patrick's Day people dress in green to honor Ireland, the Emerald Isle. Shamrock decorations are put on doors and windows and leprechauns appear everywhere. There are many traditions and activities that help kids celebrate the life of St. Patrick, the patron saint of Ireland. St. Patrick's Day is celebrated worldwide with people dancing and singing, watching St.