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<!DOCTYPE html> <html> <body> <p>I had the best date on <time id="myTime" datetime="2014-02-14T08:00Z">Valentines day</time>.</p> <p>Click the button to change the value of the datetime attribute of the time element above.</p> <button onclick="myFunction()">Try it</button> <p><b>Note:</b> The time element does not render as anything special in any of the major browsers.</p> <p><b>Note:</b> The dateTime property is only supported in Firefox and Opera 12.</p> <p id="demo"></p> <script> function myFunction() { document.getElementById("myTime").dateTime = "1999-06-24T09:30Z"; document.getElementById("demo").innerHTML = "The date and time was changed from '2014-02-14T08:00Z' to '1999-06-24T09:30Z'."; } </script> </body> </html>