<!DOCTYPE html>
<html>
<body>
Enter a date between 1980-01-01 and 2000-01-01:
<input type="date" id="myDate" name="bday" min="1980-01-01" max="2000-01-01">
<p>Click the button to display the value of the max attribute of the date field.</p>
<button onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> input elements with type="date" do not show as any date field/calendar in Firefox.</p>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myDate").max;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>