The number of people who celebrate Christmas varies from country to country. In some countries, it is the most widely celebrated holiday, while in others, it is celebrated to a lesser degree or not at all. According to a 2017 survey, about 2.3 billion people worldwide celebrate Christmas, which is approximately 31% of the world's population. This includes people from many different religions, cultures, and backgrounds, who may celebrate Christmas in different ways or with different traditions.