http://www.bbc.co.uk/religion/0/20394641 http://www.bbc.co.uk/religion/0/20394641 Why are there seven days in a week? Why are there seven days in a week? Why are there seven days in a week? BBC: Why are there seven days in a week? http://www.bbc.co.uk/religion/0/20394641 Why are there seven days in a week? BBC News BBC: Why are there seven days in a week? BBC: Why are there seven days in a week?