How to get a number of days in a specified month using JavaScript?

To get numbers of days in a month, use the getDate() method and get the days.

Example

You can try to run the following code to get a number of days in a month −

Live Demo

<!DOCTYPE html>
<html>
   <body>
      <script>
      var days = function(month,year) {
         return new Date(year, month, 0).getDate();
      };
      document.write("Days in July: "+days(7, 2012)); // July month
      document.write("<br>Days in September: "+days(9, 2012)); // September Month
      </script>
   </body>
</html>

Output

Days in July: 31
Days in September: 30

Updated on: 17-Jun-2020

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