Format Dates in Any Timezone
var jun = moment("2014-06-01T12:00:00Z");
var dec = moment("2014-12-01T12:00:00Z");
jun.tz('America/Los_Angeles').format('ha z'); // 5am PDT
dec.tz('America/Los_Angeles').format('ha z'); // 4am PST
jun.tz('America/New_York').format('ha z'); // 8am EDT
dec.tz('America/New_York').format('ha z'); // 7am EST
jun.tz('Asia/Tokyo').format('ha z'); // 9pm JST
dec.tz('Asia/Tokyo').format('ha z'); // 9pm JST
jun.tz('Australia/Sydney').format('ha z'); // 10pm EST
dec.tz('Australia/Sydney').format('ha z'); // 11pm EST
Convert Dates Between Timezones
var newYork = moment.tz("2014-06-01 12:00", "America/New_York");
var losAngeles = newYork.clone().tz("America/Los_Angeles");
var london = newYork.clone().tz("Europe/London");
newYork.format(); // 2014-06-01T12:00:00-04:00
losAngeles.format(); // 2014-06-01T09:00:00-07:00
london.format(); // 2014-06-01T17:00:00+01:00