How to add hours in datetime in JavaScript [duplicate]

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.

Also, "It didn't work" is really not enough information - please share what exactly happened - did you get any errors? — Lix
– Lix, Commented Jul 26, 2018 at 8:41
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
– James Whiteley, Commented Jul 26, 2018 at 8:43

Hardik Shah · Accepted Answer · 2018-07-26 08:54:24Z

18

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.

answered Jul 26, 2018 at 8:54

Hardik Shah

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YuraGon · Accepted Answer · 2018-07-26 08:47:07Z

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, 2018 at 8:47

YuraGon

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