Most holidays were founded on either the celebration of our ancestors, or showing gratitude for their actions. Many people across the globe think of Christmas as a holiday where you exchange gifts, tell stories about Santa Claus, and have a large meal with family and friends. However, Christmas has a great importance to Christians, and has a deeper meaning to along with it. This is true with many other religious holidays.
As you have read holidays bring many new and contrasting traditions worldwide, and can symbolize many different things. In my opinion, it is important to learn about them all not only for interest but also so that we can understand one another as people.