There are seven days in a week. They are Sunday, Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Most(多数) children go to school from Monday to Friday. Most people don't work on Saturday or Sunday and most shops are closed in England on Saturday and Sunday.
But in China shops are open every day. Sunday is always a holiday. Some people go to church(教堂) on that day. The time between Friday evening and Monday morning is the weekend. It is time for rest. We don't work all the time. We have to rest from time to time. We rest over the weekend.