Christmas is a very important Western festival. It is on the 25th of December. People decorate (装饰) their homes. They send Christmas cards to their relatives(亲戚) and friends, and they buy Christmas trees. They buy presents and put them under the Christmas tree. Some families open their presents on Christmas Eve. On Christmas Day, people can see lights in the street. They get together with their family and have a big meal. They also sing songs. They have a good time.