what's the 12 days of christmas

The 12 Days of Christmas is a traditional Christmas song that describes a series of gifts that were given over a period of 12 days. The gifts range from a partridge in a pear tree to 12 drummers drumming. The song is often sung as part of the holiday season, and is believed to have originated from a 16th century English round. It is also known as the "Twelve Days of Christmas".