title: PHPExcel date field does not match source spreadsheet
body: <p>This is what is in my spreadsheet:</p>
  
  <pre><code>12/04/2011  8:56:17 p.m. (xls dateserial = 40645.87242)
  </code></pre>
  
  <p>this is my code I'm using to extract the date and convert to date string in PHP:</p>
  
  <pre><code>$txn_date_xls = $sheet-&gt;getCell("H$row")-&gt;getValue();               
  echo "Txn Date (original): $txn_date_xls&lt;br /&gt;";
  
  $txn_date = PHPExcel_Shared_Date::ExcelToPHP($txn_date_xls);
  echo "Txn Date: ".date('Y-m-d H:i:s', $txn_date)."&lt;br /&gt;";
  </code></pre>
  
  <p>This is the output from my script:</p>
  
  <pre><code>Txn Date (original): 40644.55783637732
  Txn Date: 2011-04-11 13:23:17
  </code></pre>
  
  <p>The date serial doesn't match the original spreadsheet.
  So, I'm trying to determine if this is a bug with PHPExcel or I have missed a setting or something, that I need to do before extracting the dateserial from the cell. Possibly a timezone issue? </p>
  
  <p>Sorry, I'm not very familiar with the PHPExcel library yet.</p>