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<!DOCTYPE html> <html> <body> <p>Click the button to display the UTC time.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function addZero(i) { if (i < 10) { i = "0" + i; } return i; } function myFunction() { var d = new Date(); var x = document.getElementById("demo"); var h = addZero(d.getUTCHours()); var m = addZero(d.getUTCMinutes()); var s = addZero(d.getUTCSeconds()); x.innerHTML = h + ":" + m + ":" + s; } </script> </body> </html>