title: Laravel : Set Timestamp return only custom date
body: <p>In my app I just set <code>timezone</code> as <code>UTC</code> when I return response I got date  format as <code>UTC</code>.</p>
  
  <pre><code>    "created_at": {
          "date": "2018-05-18 15:17:37.000000",
          "timezone_type": 3,
          "timezone": "UTC"
      },
      "updated_at": {
          "date": "2018-06-08 05:49:05.000000",
          "timezone_type": 3,
          "timezone": "UTC"
      }
  </code></pre>
  
  <p>But I only need <code>updated_at : 2018-06-08 05:49:05</code>, I do not need <code>timzone type, timezone</code>..
  Expected :</p>
  
  <pre><code>    "country"   : "United States Of America",
      "region"    : "Northeast",
      "updated_at": "2018-06-08 05:49:05"
  </code></pre>
  
  <p>How can i do this ? </p>