The 12 Days of Christmas is a popular Christmas song that lists a series of gifts given on each of the 12 days leading up to Christmas. However, the actual date of when the 12 Days of Christmas begins varies depending on the country and tradition. In some countries, the 12 Days of Christmas start on Christmas Day, December 25th, and end on January 6th, also known as the Epiphany or Three Kings Day. In other countries, the 12 Days of Christmas are counted from December 26th to January 6th.