Summarize this article:

The midnight mass commemorates the birth of Jesus. La Misa del Gallo means “The Rooster Mass” since it is believed the birth of Jesus was first announced by a rooster’s crow. Listen to the boys’ choir perform during the candlelit service. While the mass is held countrywide, the most impressive service is in Montserrat, 60 kilometres (37 mi) outside of Barcelona. The main Christmas meal is usually eaten very late, just before the midnight mass. A common traditional Spanish entree is turkey stuffed with truffles, but coastal regions such as Galicia serve seafood as their main dish. Celebrate with a large dinner. Finish your meal with traditional desserts, like turrónes (candy with almonds and honey), polvorones (almond and cinnamon shortbreads), and Roscón de Reyes (a fruitcake in the shape of a ring). A common saying on Christmas Eve is “esta noche es Nochebuena, y no es noche de dormir,” which translates to “This is the Good Night, therefore it is not meant for sleep.” Many families will sing and dance in the streets and party most of the night, or they will sing carols around the tree at home.
Attend La Misa del Gallo if you’re religious. Have a feast late in the evening. Sing carols and dance around the Christmas tree.