what day does the 12 days of christmas start

The 12 Days of Christmas are traditionally counted from December 25th, the day of Christmas, through January 5th, also known as the Feast of the Epiphany. The song "The Twelve Days of Christmas" refers to the days between December 25th and January 5th, each of which is a day in its own right. On each of these days, there is a special gift given, such as "a partridge in a pear tree" on the first day, and "eleven pipers piping" on the eleventh day.