diff --git a/index.html b/index.html
index ef7a317..991a1a3 100644
--- a/index.html
+++ b/index.html
@@ -136,6 +136,8 @@
 <div class="page">
   <div class="header">
     <h1>C41 Archive</h1>
+    <span class="spacer" style="flex:1"></span>
+    <button id="rescan-btn" title="Rescan the archive folder" style="background:var(--surface);color:var(--text);border:none;padding:6px 10px;border-radius:3px;font-size:14px;cursor:pointer;margin-right:8px">&#x21bb;</button>
     <select id="date"></select>
   </div>
 
@@ -707,6 +709,21 @@
 
   dateSelect.addEventListener("change", () => loadDate(dateSelect.value));
   addEventListener("resize", drawTimeline);
+
+  // rescan: button + silent auto-poll for new dates
+  const rescanBtn = document.querySelector("#rescan-btn");
+  async function rescan(notify) {
+    try {
+      const r = await fetch("/api/rescan", {method: "POST"});
+      const d = await r.json();
+      if (notify) setStatus(`${d.days} day${d.days !== 1 ? "s" : ""}, ${d.clips} clip${d.clips !== 1 ? "s" : ""} indexed`);
+      loadDate(dateSelect.value || "");
+      return d;
+    } catch { return null; }
+  }
+  rescanBtn.addEventListener("click", () => rescan(true));
+  setInterval(() => { if (!queue.some(e => e.state === "busy")) rescan(false); }, 30000);
+
   loadDate("").catch(() => {});
   updateEncodeStatus();
 </script>
diff --git a/server.py b/server.py
index 8ca1551..d241c22 100644
--- a/server.py
+++ b/server.py
@@ -111,6 +111,11 @@ class PlayerHandler(BaseHTTPRequestHandler):
 
     def do_POST(self):
         path = urlparse(self.path).path
+        if path == "/api/rescan":
+            self.server.recordings = scan_recordings(self.server.output_root)
+            self.server.system_highlights = scan_system_highlights(self.server.source_root)
+            count = sum(map(len, self.server.recordings.values()))
+            return self.send_json({"ok": True, "days": len(self.server.recordings), "clips": count})
         if path == "/api/upload":
             return self.handle_upload()
         if path == "/api/encode":