Moment

by Mark Pitman

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.6/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment-duration-format/1.3.0/moment-duration-format.js"></script>

JavaScript

var start = new Date("2015-12-12T15:00:00");
var dur = moment.duration(start, new Date());
console.log(dur.humanize());