Hmmm...... Well, not much really. Most places are closed on Christmas Day, as it's a holiday. However, there are some places that are open, such as restaurants, gas stations, and some grocery stores. If you're in a big city, there might be some stores and shopping malls open, but they're usually only open for a few hours in the morning. There are also some movie theaters that might be open, but they often have limited showings on Christmas Day.