The Modern JS Tutorial: Date and Time: Last day of month

	function getLastDayOfMonth(year, month) {
	const months = [
	'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec'
	];
	const date = new Date(year, month + 1, 0);
	return `Last day of ${months[month]}, ${year} is ${date.getDate()}`;
	}
	console.log( getLastDayOfMonth(2012, 0) ); // 31
	console.log( getLastDayOfMonth(2012, 1) ); // 29
	console.log( getLastDayOfMonth(2013, 1) ); // 28

view raw jst_dateAndTime_5_lastDayOfMonth.js hosted with ❤ by GitHub