The 12 days of Christmas typically start on December 25th, the day after Christmas, and end on January 6th, the day of the Epiphany. These 12 days represent the period between Christmas and the arrival of the Three Wise Men to visit the newborn Jesus. It is a time of celebration and remembrance of the birth of Christ and the arrival of the Magi. During these 12 days, many people exchange gifts, sing carols, and participate in various religious and cultural activities associated with Christmas.