Moment.js

A lightweight javascript date library for parsing, manipulating, and formatting dates.

Get it

npm install moment
Production Version 1.1.12.5kb minified & gzippedDevelopment Version 1.1.117.8kb full source + comments

Use it

var now = moment();
console.log(now.format('dddd, MMMM Do YYYY, h:mm:ss a'));

var aWhileAgo = moment([2011, 10, 30]);
console.log(aWhileAgo.fromNow());

var now = moment().add('days', 9);
console.log(now.format('dddd, MMMM Do YYYY'));

var now = moment();
moment.lang('fr')
console.log(now.format('LLLL'));