How to add hours in datetime in JavaScript

Question

I want to add hours in DateTime. I have googled it but couldn't find any code.

Here is this datetime 2018-07-25 20:23:22. I want to add hours in this datetime so it gives me new datetime in the same format

I have tried this.

var datetime = "2018-07-25 20:23:22";
datetime.setHours(datetime.getHours()+5);

But It didn't work.

Consider https://momentjs.com/ library for date manipulations. — jbrtrnd, Jul 26 '18 at 08:41
Also, "It didn't work" is *really* not enough information - please share what exactly happened - did you get any errors? — Lix, Jul 26 '18 at 08:41
Your `datetime` is a String. Setting hours on a String doesn't make any sense - as Lix suggests, `datetime` needs to be a `Date`. — James Whiteley, Jul 26 '18 at 08:43

score 17 · Answer 1 · answered Jul 26 '18 at 08:54

Your datetime is String. You need to convert it into Date object first.

var datetime = new Date("2018-07-25 20:23:22");
console.log("Before: ", datetime);
datetime.setHours(datetime.getHours()+1); 
console.log("After: ", datetime);

I would prefer to use moment.js library for manipulating and playing with dates.

Hope this may help you.

score 6 · Answer 2 · answered Jul 26 '18 at 08:47

6

Here is the simple way with using Moment.js

const date = moment('2018-07-25 20:23:22');
date.add(5, 'h');
console.log(date.toString());

answered Jul 26 '18 at 08:47

YuraGon

147
6

How to add hours in datetime in JavaScript

2 Answers2