title: adding weekdays - clears the time
body: <p>I've tired to add 10 weekdays to now. Everything is OK, but it clears the time part. Do you know why?</p>
  
  <pre><code>$now = date("Y-m-d H:i:s");
  echo $now.'&lt;br&gt;';
  $mod = strtotime($now." +10 weekdays");
  echo $mod.'&lt;br&gt;';
  echo date("Y-m-d H:i:s",$mod).'&lt;br&gt;';
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>2011-05-23 14:34:02
  1307311200
  2011-06-06 00:00:00
  </code></pre>
  
  <p>My expected output were:</p>
  
  <pre><code> 2011-06-06 14:34:02
  </code></pre>
  
  <p>Thanks.</p>