title: Get Monday and Sunday and last year's Monday and Sunday, same week
body: <p>Given datetime.datetime.now(), how do I get this week's Monday - Sunday and then the same Monday - Sunday for last year, considering leap years?</p>
  
  <p>One idea I had was to get the timedelta for -365 days and then find the nearest Monday or Sunday.  I'm sure there is a better way.</p>
  
  <p>Edit:  I don't mind using datetuil, if there is something in there that'd make this easier.</p>