The JavaScript date setHours() method sets the hour value for a particular date on the basis of local time.
Syntax:
dateObj.setHours(new_Hours);
Parameters:
new_Hours: Integer value between 0 to 23.
Example:
<!DOCTYPE html>
<html>
<body>
<script>
var bday =new Date("November 16, 1994 21:00:10");
document.writeln(bday.getHours() + "<br>");
bday.setHours(12);
document.writeln(bday.getHours());
</script>
</body>
</html>