utilizando datas e timezone em javascript

dependencies.txt

moment.min.js
moment-timezone-with-data-2010-2020.min.js

index.html

UTC<br/>
<div id="divUTC"></div><br/>
Your Local Time with respect to above UTC time<br/>
<div id="divLocal">
</div>    
<br/>Thailand date time<br/>
<div id="divThai">
</div>  
<br/>America date time<br/>
<div id="divUsa">
</div>  

main.js

$(function(){
  setInterval(function(){
    var divUtc = $('#divUTC');
    var divLocal = $('#divLocal');  
    //put UTC time into divUTC  
    divUtc.text(moment.utc().format('YYYY-MM-DDTHH:mm:ss'));      
    
    //get text from divUTC and conver to local timezone  
    var localTime  = moment.utc(divUtc.text()).toDate();
    localTime = moment(localTime).format('YYYY-MM-DDTHH:mm:ss');
    divLocal.text(localTime);  
      
    $('#divThai').text(moment.tz('Asia/Bangkok').format('YYYY-MM-DD HH:mm:ss'));
    $('#divUsa').text(moment.tz('America/Los_Angeles').format('YYYY-MM-DD HH:mm:ss'));
  },1000);
});