The increasing commercialism of Christmas can be used to illustrate the concept of inflation. In The Grinch Who Stole Christmas, the Whos engage in a yearly competition to have the best Christmas light display. Each year the neighbors attempt to outdo each other with bigger and more extravagant displays. In a similar manner, inflation can devalue money and cause people to spend an increasing amount of money each year to keep up with the past. A specific length of Christmas lights isn’t as valuable the next year as it was the year before and neighbors will have to spend more and more to remain competitive.
Thanks to Mandy Mandzik for the clip recommendation. Check out her working paper, All I Want for Christmas is an A on My Econ Final: A Holiday-Themed Review Class, for more Christmas-themed economics examples.