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<html><body>Date: <input type="datetime-local" id="myLocalDate" value="2014-11-16T15:25:33"><p>Click the button to change the default value of the 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").defaultValue = "2015-01-02T11:42:13.510";}</script></body></html>