Do you know much about Christmas? The first thing that many people don't know in Japan is that Christmas is twelve days long. The best way to remember that is to remember the song The Twelve Days of Christmas:

On the 1st day of Christmas my true love sent to me… a partridge in a pear tree
On the 2nd day of Christmas my true love sent to me… 2 turtle doves, and a partridge in a pear tree
On the 3rd day of Christmas my true love sent to me… 3 French hens, 2 turtle doves, and a partridge in a pear tree
On the 4th day of Christmas my true love sent to me… 4 calling birds, 3 French hens, 2 turtle doves, and a partridge in a pear tree

On the 5th day of Christmas, my true love sent to me 5 golden rings... 4 calling birds, 3 French hens, 2 turtle doves, and a partridge in a pear tree.

partridge ヤマウズラ
pear tree 梨の木
turtle dove キジバト
hen めんどり
calling bird = collie bird = 炭鉱用の鳥