I am trying to create a custom formula field that would calculate the calendar week based of the created date field.  Ideally I would like a created date of 6/13/2013 to yield a value of calendar week value of 6/9/2013.  I am not sure if this is even possible.  If not another option would be to put it as a date range so 6/13/2013 would return a calendar week value of 6/9/2013 - 6/15/2013.

Any help on this would be appreciated.

Thanks!