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<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>Multi-locale time</title>

</head>

<body>

  <h1>en-US vs de-DE (UTC)</h1>

  <pre id="out"></pre>

  <script>

    var instant = new Date(Date.UTC(2026, 2, 15, 14, 30, 0));

    document.getElementById("out").textContent =

      instant.toLocaleTimeString("en-US", { timeZone: "UTC" }) + "\n" +

      instant.toLocaleTimeString("de-DE", { timeZone: "UTC" });

  </script>

</body>

</html>

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JavaScript Date toLocaleTimeString() — en-US vs de-DE (Try It)