title: Laravel 5.2 - How to update "updated_at" field with UTC timestamp?
body: <p>I'm using Laravel 5.2 (on PHP version 7) and below is the update query I'm running:</p>
  
  <pre><code>$data=DB::table('posts')
                          -&gt;where("id", $post_id)
                          -&gt;update(
                              array(
                                  'title'         =&gt;      $request['title'],
                                  'body'          =&gt;      $request['body'],
                                  'slug'          =&gt;      str_slug($request['title']),
                                  'updated_at'    =&gt;      DB::raw('CURRENT_TIMESTAMP')
              ));
  </code></pre>
  
  <p>The "updated_at" field updated with the current time. But I want to update it with the UTC timestamp. How can I achieve this?</p>