Thanks to io9 for finding this old MGM cartoon short, about a post-human world where squirrels, inexplicably, still celebrates Christmas and speak English.
[youtube=http://www.youtube.com/watch?v=J8OYvHPpGDY&color1=0xb1b1b1&color2=0xcfcfcf&hl=en&feature=player_embedded&fs=1]
Peace on Earth, and good will to all.
Merry Christmas.