momentjs - Javascript date convert to timezone with format -

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how can create date object, convert timzone datestring timezone , format below

var date="20160317t073000"; var format = "yyyymmddthhmmss"; var timezone ="america/new_york"  var newtimezone="asia/kolkata"

i want date convert newtimezone, tried moment.js, converting browser timezone

date=moment(date,format);  date.tz(timezone);  console.log(moment(date).format());

moment.js seems have : http://momentjs.com/timezone/

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

to convert format, should :

'20160317t073000'.replace(/([0-9]{4})([0-9]{2})([0-9]{2})t([0-9]{2})([0-9]{2})([0-9]{2})/, '$1-$2-$3t$4:$5:$6')

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