Kirsten plans a St. Lucia celebration for her family to keep their old Swedish traditions alive, and she secretly hopes for one special treasure. It is a celebration of festival of light, honouring St. Lucia. St. Lucia's Day is now celebrated by a girl dressing in a white dress with a red sash round her waist and . Dec 1, Today, St. Lucia's Day is celebrated in all of Scandinavia. Traditionally, girls wear white dresses and red sashes, each with an evergreen crown.