The Question and Answer section for A Christmas Carol is a great resource to ask questions, find answers, and discuss the novel.
Scrooge felt Christmas was "humbug". He thought this socializing was a waste of time and money. Scrooge was really lost in his own pain and anger.
That would be Jacob Marley with his rattling chains.
A Christmas Carol opens on Christmas Eve. (December 24th), during the Victorian Age. We are not apprised of the year.