title: Laravel insert not saved created_at, updated_at columns
body: <p>I have Calendar model. I wont to insert mass data.</p>
  
  <pre><code>$data = [
     [
         'weekday' =&gt; 1,
         'status'  =&gt; 'active'
     ]
     .......
  ];
  $calendar-&gt;insert($data)
  </code></pre>
  
  <p>but in db created_at, and updated_at is null Why??;</p>