The twelve days of Christmas are the twelve days between Christmas Day, 25 December and the Epiphany, 6 January, the day Christians celebrate the arrival of the Magi (Wise Men) .
The Christmas song, "The Twelve Days of Christmas" is a well known song which enumerates gifts, each day something more elaborate. There are many parodies .... here is a modern Australian version. However, the song actually had its origins in religious symbolism - and with a serious purpose. It dates from a time of religious persecution. The song, "The Twelve Days of Christmas," was written as a kind of secret catechism that could be sung in public without fear of arrest - a learning or memory aid to Christians.