The Eve of the Immaculate Conception is observed in Guatemala and Colombia on December 7. In Colombia, the celebration is known as Little Candles' Day (Día de las Velitas), where people light candles and paper lanterns to express their belief in the dogma of the Immaculate Conception of the Virgin Mary. This tradition results in a vibrant display of lights on porches, balconies, and streets. In Guatemala, the day is marked by the Burning of the Devil (Quema del diablo), where families gather to make bonfires and burn effigies of Satan, a ritual believed to cleanse homes of evil and herald the Christmas season. This custom has its origins in colonial times, although it has raised environmental concerns in recent years. Both celebrations reflect deep cultural and religious significance in their respective countries.