title: Momentjs: How to convert date/time of one timezone to UTC date/time
body: <p>I have a date/time with a timezone and want to convert it into UTC</p>
  
  <pre><code>const date = '2019-04-10T20:30:00Z';
  const zone = 'Asia/Kuala_Lumpur';
  const utcDate = moment(date).tz(zone).utc().format();
  console.log('UTC Date : ', utcDate);
  </code></pre>
  
  <p>is my date variable is in standard formate for UTC? How to cast this time zone to another time zone?</p>