HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>+15 UTC minutes</title>
</head>
<body>
  <h1>12:50 UTC + 15</h1>
  <pre id="out"></pre>
  <script>
    var date = new Date(Date.UTC(2026, 2, 1, 12, 50, 30));
    date.setUTCMinutes(date.getUTCMinutes() + 15);
    document.getElementById("out").textContent =
      "UTC hour: " + date.getUTCHours() + "\n" +
      "UTC minute: " + date.getUTCMinutes() + "\n" +
      "UTC second: " + date.getUTCSeconds();
  </script>
</body>
</html>

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JavaScript Date setUTCMinutes() — add 15 min (Try It)