JAVASCRIPT

get timezone

var timedifference = new Date().getTimezoneOffset();

Get specific timezone time

function calcTime(city, offset) {

    d = new Date();

    utc = d.getTime() + (d.getTimezoneOffset() * 60000);

    nd = new Date(utc + (3600000*offset));

    return "The local time in " + city + " is " + nd.toLocaleString();

}

// get Bombay time
console.log(calcTime('Bombay', '+5.5'));

// get Singapore time
console.log(calcTime('Singapore', '+8'));

// get London time
console.log(calcTime('London', '+1'));

Get the Timezone

if (!sessionStorage.getItem('timezone')) {
  var tz = jstz.determine() || 'UTC';
  sessionStorage.setItem('timezone', tz.name());
}
var currTz = sessionStorage.getItem('timezone');

get timezone

var timedifference = new Date().getTimezoneOffset();
//This returns the difference from the clients timezone from UTC time. You can then play around with it as you like.