In the Southwest, luminarias — lanterns made from brown paper bags weighted down with sand and illuminated by a lit candle — are displayed on Christmas Eve. Many Mexican Americans celebrate Las Posadas, a procession that re-enacts Mary and Joseph’s search for a place to bed down in Bethlehem. Swedish Americans hold St. Lucia festivals, and in Puerto Rico there are parrandas, where friends go from one house to the next singing traditional songs, “surprising” their friends and waking them with their music.