HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>+7 UTC days</title>
</head>
<body>
  <h1>Jan 28 UTC + 7</h1>
  <pre id="out"></pre>
  <script>
    var date = new Date(Date.UTC(2026, 0, 28, 0, 0, 0));
    date.setUTCDate(date.getUTCDate() + 7);
    document.getElementById("out").textContent =
      "UTC month: " + date.getUTCMonth() + "\n" +
      "UTC date: " + date.getUTCDate();
  </script>
</body>
</html>

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JavaScript Date setUTCDate() — add 7 days (Try It)