Christmas carols are traditional songs or hymns that are sung during the Christmas season, celebrating the birth of Jesus Christ. They can range from joyful, upbeat tunes to more solemn and contemplative melodies, often featuring lyrics that reflect on the joy and wonder of the holiday. Some popular Christmas carols include "Silent Night," "Jingle Bells," and "O Holy Night." Many families and communities enjoy gathering together to sing Christmas carols during the holiday season, creating a warm and festive atmosphere.