JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://fullcalendar.io/js/fullcalendar-2.3.2/lib/moment.min.js"></script>

JavaScript

document.write("Unix Value: " + 1424102400000);
document.write("<br>");

var date = moment(new Date(1424102400000)).format('YYYY-MM-DD HH:mm');
document.write("Conversão: " + date);
document.write("<br>");
document.write("<br>");

var dateUnixConvert =  moment(date).unix();
document.write("Unix Value Novamente: " + dateUnixConvert);

var dateConvert = moment(new Date(dateUnixConvert)).format('YYYY-MM-DD HH:mm');
document.write("<br>");
document.write("Conversão: " + dateConvert);