My antagonist, a typical Scrooge-like character, has travelled back in time to stop Christmas from ever becoming celebrated.
What is the smallest change I could make to history to stop Christmas from happening? I don't want to completely change today's society as we know it (although obviously there would be some change), so the smallest change possible would be ideal. Any details of any other possible side-effects from this change would be great to hear about too.
Another festival type event happening around the end of December / beginning of January is only acceptable if it is suitably different from Christmas, but if you can eliminate the festival altogether this would be the best answer.