Auld Lang Syne is attributed to Robert Burns but, in fact, he didn't write it- or at least, not all of it; he wrote down and arranged an older Scottish folk song. In 1788, he sent a copy of it to a friend, saying about it: "There is more of the fire of native genius in it than in half a dozen of modern English Bacchanalians!" Then, in 1793 he sent it to be included in a compilation book of old Scottish songs with a letter stating, "The following song, an old song, of the olden times, and which has never been in print, nor even in manuscript until I took it down from an old man."
The song is used to close out many occasions in Scotland, but became closely associated with New Years thanks to Guy Lombardo and his Royal Canadians, who for 50 years ended their New Years Eve broadcast with Auld Lang Syne.
I'll personally be spending the evening with family and friends, playing games, eating good food, and perhaps watching a movie. However you're seeing in the New Year, have a happy one.