title: Value of datetime input field can not pass validation
body: <p>I have this input field for picking date and time</p>
  
  <pre><code>&lt;input type="datetime-local" class="form-control" id="game-date-time-text" name="game_date_time"&gt;
  </code></pre>
  
  <p>And I am trying to format it with below rule</p>
  
  <pre><code>'game_date_time' =&gt; 'required|date_format:Y-m-dTH:i'
  </code></pre>
  
  <p>When I look at the value of this field in my request, an example value looks like this</p>
  
  <blockquote>
    <p>2001-03-13T13:30</p>
  </blockquote>
  
  <p>I tried arious types of datetime formats including the one above but my input value can not pass validation. What is the problem here ?</p>
  
  <p>Any help would be appreciated.</p>