moment for relative time
by Miguel Roman
HTML
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.14.1/moment.js"></script>
<p id="date">
</p>JavaScript
var seconds = 1234;
var date = new Date();
date.setSeconds(date.getSeconds() - seconds);
var dateElement = document.getElementById("date");
dateElement.innerText = moment(date).fromNow();