<!DOCTYPE html>
<html>
<body>
Time: <input type="time" id="myTime" min="20:00" max="22:00">
<p>Click the button to change the value of the min attribute of the time field.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myTime").min = "16:00";
document.getElementById("demo").innerHTML = "The value of the min attribute was changed from '20:00' to '16:00'.";
}
</script>
</body>
</html>