what are the themes of a christmas carol

A Christmas Carol is a novella by Charles Dickens that was first published in 1843. It tells the story of Ebenezer Scrooge, a bitter and miserly old man who is visited by the ghosts of Christmas past, present, and future, who show him the error of his ways and encourage him to change his ways before it's too late. The novella is a classic example of the Christmas theme and has been adapted into numerous films, plays, and other media.