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
8 Days of Christmas (song) based on "The Twelve Days of Christmas", but the "8 Days" in the title is a reference to Hanukkah, but the holiday is never mentioned in the song. Knowles stated during the "8 Days of Christmas" video premiere at 106 & Park in Fall 2001: "Actually we wrote the song two years ago, when we went in the studio to do some Christmas something. That's what started the idea of doing a Christmas album." A video was filmed for "8 Days of Christmas" and was released in the winter of 2001. It was directed by Sanaa Hamri. All 3 members