diff --git a/index.html b/index.html
new file mode 100644
index 0000000..9a69c3d
--- /dev/null
+++ b/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>World Clock</title>
+  <style>
+    body {
+      font-family: Arial, sans-serif;
+      display: flex;
+      justify-content: center;
+      align-items: center;
+      min-height: 100vh;
+      margin: 0;
+      background: #f4f4f4;
+    }
+    .container {
+      display: flex;
+      flex-wrap: wrap;
+      justify-content: center;
+      gap: 20px;
+    }
+    .clock {
+      background: white;
+      padding: 20px 40px;
+      border-radius: 8px;
+      box-shadow: 0 2px 6px rgba(0,0,0,0.2);
+      text-align: center;
+      font-size: 2em;
+      position: relative;
+    }
+    .offset {
+      font-size: 0.6em;
+      color: lightgray;
+      position: absolute;
+      top: 50px;
+      left: 40px;
+    }
+    .label {
+      font-size: 0.7em;
+      color: #666;
+      display: block;
+      margin-bottom: 5px;
+    }
+    .spacer {
+      height: 20px;
+      display: block;
+    }
+  </style>
+</head>
+<body>
+  <div class="container">
+    <div class="clock">
+      <span class="label">Frankfurt</span>
+      <span class="offset">-6h</span>
+      <span class="spacer"></span>
+      <span id="frankfurt-time"></span>
+    </div>
+    <div class="clock">
+      <span class="label">Shanghai</span>
+      <span class="offset">+6h</span>
+      <span class="spacer"></span>
+      <span id="shanghai-time"></span>
+    </div>
+  </div>
+
+  <script>
+    function updateClocks() {
+      const now = new Date();
+
+      const frankfurt = new Intl.DateTimeFormat("en-GB", {
+        timeZone: "Europe/Berlin",
+        hour: "2-digit",
+        minute: "2-digit",
+        second: "2-digit",
+        hour12: false
+      }).format(now);
+
+      const shanghai = new Intl.DateTimeFormat("en-GB", {
+        timeZone: "Asia/Shanghai",
+        hour: "2-digit",
+        minute: "2-digit",
+        second: "2-digit",
+        hour12: false
+      }).format(now);
+
+      document.getElementById("frankfurt-time").textContent = frankfurt;
+      document.getElementById("shanghai-time").textContent = shanghai;
+    }
+
+    setInterval(updateClocks, 1000);
+    updateClocks();
+  </script>
+</body>
+</html>
