The ghost of Christmas present has been mentioned in Charles Dickens's novel "A Christmas Carol." It represents the present moment and reminds us to appreciate what we have and be grateful for the joys of the present. In the novel, it is described as a jolly, happy figure, dressed in a green robe with leaves and flowers, and carrying a torch of plenty. It is a reminder to cherish the present moment and make the most of our time, not just during the holiday season but throughout the year.