момент JS добавить день
var new_date = moment(startdate, "DD-MM-YYYY").add(5, 'days');
Attractive Addax
var new_date = moment(startdate, "DD-MM-YYYY").add(5, 'days');moment(date, "DD-MM-YYYY hh:mm:ss")
.add(10, 'minutes')
.format('DD/MM/YYYY hh:mm:ss');var travelTime = moment().add(642, 'seconds').format('hh:mm A');// it will add 642 seconds in the current time and will give time in 03:35 PM format
var travelTime = moment().add(11, 'minutes').format('hh:mm A');// it will add 11 mins in the current time and will give time in 03:35 PM format; can use m or minutes
var travelTime = moment().add(2, 'hours').format('hh:mm A');// it will add 2 hours in the current time and will give time in 03:35 PM format