What is misa de gallo?

The "misa de gallo" (Spanish for "rooster's mass") is a traditional Catholic Mass celebrated in various Latin American countries, particularly Mexico, on Christmas Eve. It is also known as "Misa de Aguinaldo" in the Philippines. The name alludes to the early hour at which the Mass is held, often just before midnight, symbolizing the rooster's crowing that heralded the birth of Jesus Christ. The "misa de gallo" is one of the most important and beloved Christmas traditions in participating regions, drawing large crowds of worshippers.