They are lightly sweet saffron buns that originate from Sweden. They are traditionally served on December 13, which is St. Lucia Day. This festival of light is held on the darkest day of the year, and these sunshine-colored rolls are perfect for the celebrations.u003cbr/u003eOn St. Lucia Day in Sweden, the oldest girl in the household will dress in a long white gown and put a crown of evergreen branches and candles on her head. She arises early and serves her family fresh St. Lucia buns and hot coffee as breakfast in bed.