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<html><body><form action="/action_page.php"> Month: <input type="month" id="myMonth" name="bdaymonth" required> <input type="submit"></form><p>Click the "Try it" button to find out if the month field must be filled out before submitting the form.</p><button onclick="myFunction()">Try it</button><p><strong>Note:</strong> input elements with type="month" do not show as any date field/calendar in Firefox.</p><p id="demo"></p><script>function myFunction() { var x = document.getElementById("myMonth").required; document.getElementById("demo").innerHTML = x;}</script></body></html>