title: Find Quarter from first day of the week
body: <p>I am trying to find the Quarter from the firstday of the week. </p>
  
  <p>For example, The first day of the week is <code>12/31/2012</code> </p>
  
  <p>I want the quarter to say Q1 2013. But if I find the Qtr from the specific date it says Q4 2012.</p>