You can use JavaScript’s built-in Date object to get the last day of a month. Create a new date object for the first day of the next month and set the day to 0 (which means the last day of the previous month).
JavaScript gets the last day of the month example
Simple example code.
<!DOCTYPE html>
<html>
<body>
<script>
var month = 0; // January
var d = new Date(2008, month + 1, 0);
console.log(d.toString());
</script>
</body>
</html>
Output:
![JavaScript get last day of month](https://i0.wp.com/tutorial.eyehunts.com/wp-content/uploads/2023/04/JavaScript-get-last-day-of-month.jpg?resize=491%2C163&ssl=1)
JavaScript gets the last day of the Month – based on Year, Month, and day
function getLastDayOfMonth(date) {
// Get the year and month from the given date object
const year = date.getFullYear();
const month = date.getMonth();
// Create a new date object for the next month
// and set its day to 0, which means the last day of the current month
const lastDayOfMonth = new Date(year, month + 1, 0);
// Return the last day of the month
return lastDayOfMonth.getDate();
}
const myDate = new Date('2023-04-15');
console.log(getLastDayOfMonth(myDate));
Output: 30
Do comment if you have any doubts or suggestions on this Js date object topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version