It was a tradition in my family to read this poem every Christmas Eve just before bedtime when I was young. The poem was first published anonymously in 1823, but Moore admitted authorship in 1837. The poem is credited with cementing the idea of Santa Claus and gift-giving into the Christmas traditions of modern times. This is the earliest edition that I was able to locate, and the entire poem is included beneath the fold.
Ice Swimmer says
Merry Mishmush and Good Night for all!
chigau (違う) says
Merry Chilloutmas to everyone.