x
<html><body><input type="datetime-local" id="myLocalDate"><p>Click the button to disable the local datetime field.</p><button onclick="myFunction()">Try it</button><p><strong>Note:</strong> input elements with type="datetime-local" do not show as any datetime field/calendar in Firefox.</p><script>function myFunction() { document.getElementById("myLocalDate").disabled = true;}</script></body></html>