It was not a restoration. The Victorians created Christmas As We Know It, with the family gathered in, a tree decorated, gifts, a feast, all on Dec.25th. Before then, Christmas was a season, twelve days long , with a big party at the end. It was an occasion for formal begging- look at the words to Gower Wassail and similar songs: they were sung by people who came to your door ( especially if you were well-off) to ask for money or food or both. There were religious ceremonies as well, of course, but for the Anglo world the day became the big family holiday in the Victorian era.. How much Dickens created this? He certainly expressed it. His writing is all about families and friends ( the Pickwick Papers especially seems to be all about them visiting each other) and there were very strong economic forces in the Industrial Revolution that tended to split families, uproot people and make them move away from home, send father out of the house to work during the day, not require children to be working in the house or for the family business, so it's natural that people would like to read about families and friends getting together, and also like to have a family holiday. Perhaps somebody has some hard survey data somehow collected on this in 1870, but both Dickens and Christmas met the same deep need in the Victorian world, and it seems a stretch to claim he created Christmas with just one of his Christmas stories.