title: Customize the datetime format in Cakephp
body: <p>When I use the form helper to make a time input,usaually I write code as follows</p>
  
  <pre><code>&lt;?php
  $options = array(
      'label' =&gt; '',
      'type' =&gt; 'datetime',
      'timeFormat'=&gt;'24',
      'separator'=&gt;'-'
  );
  echo $form-&gt;input('Service.endtime',$options);
  ?&gt;
  </code></pre>
  
  <p>But now I get a problem that I want to make a time input style such as </p>
  
  <pre><code>month-day-hour
  </code></pre>
  
  <p>Then how can do this with setting some parameters in the helper?Suggestions would be appreciated.</p>