HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>setFullYear overload</title>
</head>
<body>
  <h1>Year + month + day</h1>
  <pre id="out"></pre>
  <script>
    var date = new Date(2026, 1, 26);
    date.setFullYear(2027, 6, 15);
    document.getElementById("out").textContent =
      "Year: " + date.getFullYear() + "\n" +
      "Month index: " + date.getMonth() + "\n" +
      "Day: " + date.getDate();
  </script>
</body>
</html>

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JavaScript Date setFullYear() — y, m, d (Try It)