Incrementing a date in JavaScript

Question

I need to increment a date value by one day in JavaScript.

For example, I have a date value 2010-09-11 and I need to store the date of the next day in a JavaScript variable.

How can I increment a date by a day?

Answer 1

Three options for you:

1. Using just JavaScript's Date object (no libraries):

My previous answer for #1 was wrong (it added 24 hours, failing to account for transitions to and from daylight saving time; Clever Human pointed out that it would fail with November 7, 2010 in the Eastern timezone). Instead, Jigar's answer is the correct way to do this without a library:

// To do it in local time var tomorrow = new Date(); tomorrow.setDate(tomorrow.getDate() + 1);  // To do it in UTC var tomorrow = new Date(); tomorrow.setUTCDate(tomorrow.getUTCDate() + 1); 

This works even for the last day of a month (or year), because the JavaScript date object is smart about rollover:

// (local time) var lastDayOf2015 = new Date(2015, 11, 31); console.log("Last day of 2015: " + lastDayOf2015.toISOString()); var nextDay = new Date(+lastDayOf2015); var dateValue = nextDay.getDate() + 1; console.log("Setting the 'date' part to " + dateValue); nextDay.setDate(dateValue); console.log("Resulting date: " + nextDay.toISOString());

2. Using MomentJS:

var today = moment(); var tomorrow = moment(today).add(1, 'days'); 

(Beware that add modifies the instance you call it on, rather than returning a new instance, so today.add(1, 'days') would modify today. That's why we start with a cloning op on var tomorrow = ....)

3. Using DateJS, but it hasn't been updated in a long time:

var today = new Date(); // Or Date.today() var tomorrow = today.add(1).day(); 

Answer 2

var myDate = new Date();  //add a day to the date myDate.setDate(myDate.getDate() + 1);