Seven days in a week,关于一周的英语作文400字

There are about fifty-two weeks in a year. And there are seven days ineach week. The first day of a week is Sunday. The other days of a week between Sunday and Saturdayare Monday, Tuesday, Wednesday Thursday and Friday. Monday is the second day, Tuesday is the third day, Wednesday is the fourthday, Thursday is the fifth day, and Friday is the sixth day. What the last day? Doyou know?