Christmas Price Index chose the items in the popular Christmas carol "The Twelve Days of Christmas" as its market basket: a partridge in a pear tree, two turtle doves, three French hens, four calling birds, five gold(en) rings, six geese, seven swans, eight maids, nine dancing ladies, ten leaping lords, eleven pipers, and twelve drummers. According to tradition, the purchasing of the items begins on December 26 and ends on January 6. PNC compiles both a "Christmas Price Index" and "The True Cost of Christmas." The "Christmas Price Index" is calculated by adding the cost of the items in the song. The "True
Twelve Days of Christmas on the same day, they do not have a series of twelve days between a feast of Christmas and a feast of Epiphany. The Oriental Orthodox, other than the Armenians, the Eastern Orthodox, and the Eastern Catholics who follow the same traditions do have the interval of twelve days between the two feasts. If they use the Julian Calendar, they celebrate Christmas on what is for them 25 December, but is 7 January of the Gregorian Calendar, and they celebrate Epiphany on what is for them 6 January, but is 19 January of the Gregorian Calendar. For the Eastern Orthodox,