Auld Lang Syne (song)

"Auld Lang Syne" is a Scots poem written by Robert Burns in 1788 and set to the tune of a traditional folk song (Roud #6294). It is well known in many countries, especially in the English-speaking world, its traditional use being to bid farewell to the old year at the stroke of midnight. By extension, it is also sung at funerals, graduations and as a farewell or ending to other occasions.

Hero: The Guardian Smurf stories
It is the song the Smurfs sing every New Year's Eve in order to bring in the new year and to bid farewell to the old year.