moment.js add days code example
Example 1: moment subtract days
var startdate = moment();
startdate = startdate.subtract(1, "days");
startdate = startdate.format("DD-MM-YYYY");
Example 2: moment js add day
var new_date = moment(startdate, "DD-MM-YYYY").add(5, 'days');
Example 3: moment js date diff
var now = "04/09/2013 15:00:00";
var then = "02/09/2013 14:20:30";
var ms = moment(now,"DD/MM/YYYY HH:mm:ss").diff(moment(then,"DD/MM/YYYY HH:mm:ss"));
var d = moment.duration(ms);
var s = d.format("hh:mm:ss");