JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.min.js"></script>
<div id="result">

</div>

JavaScript

var date = '06/30/2016';
var utcOffset = -7.0;
 
 function dateToUTC(date, offset) {
	var tzDate = moment(date).utcOffset(offset);
	var utcDate = new Date(date+tzDate.format('ZZ'));
	if(isNaN( utcDate.getTime() ) ) {
		return moment(date+tzDate.format('Z'))
	}
  return moment(utcDate);
 }
 
document.getElementById('result').innerHTML = dateToUTC(date, utcOffset);