Persuasion and influence are all around at Christmas. In fact, we can use Cialdinis principles of influence to find out why the user experience of Christmas is almost always a success. — In the Netherlands, we have a holiday called Saint Nicholas (or Sinterklaas). It’s very much like Christmas nowadays. We like to say that the idea of Santa Claus was stolen from Saint Nicholas, but there has probably been some interchange of different concepts and ideas over the years.