The 12 days of Christmas is a traditional Christmas carol that counts the days from Christmas Day to January 5th, which is the date of the Epiphany or the 12th day of Christmas. The song is often used to count down the days until the Epiphany, which is the day that Christians celebrate the arrival of the Three Wise Men to the baby Jesus. The 12 days of Christmas is a popular song and is often used as a countdown to the Epiphany or as a traditional Christmas carol.