diff --git a/sync_recurring_events.py b/sync_recurring_events.py
index e7e1cda..a44552e 100644
--- a/sync_recurring_events.py
+++ b/sync_recurring_events.py
@@ -82,6 +82,10 @@ def update_page(page_id, properties, icon=None):
     return _request("PATCH", f"/pages/{page_id}", body)
 
 
+def archive_page(page_id):
+    return _request("PATCH", f"/pages/{page_id}", {"archived": True})
+
+
 # ---------------------------------------------------------------------------
 # Property extraction
 # ---------------------------------------------------------------------------
@@ -294,6 +298,7 @@ def sync():
     created = 0
     updated = 0
     skipped = 0
+    desired_keys = set()
 
     for page in recurring_pages:
         cfg = parse_recurring_event(page)
@@ -306,6 +311,7 @@ def sync():
               f"{len(occurrences)} occurrence(s) computed.")
         for occ in occurrences:
             key = (cfg["name"], occ.isoformat())
+            desired_keys.add(key)
             props = _build_calendar_properties(cfg, occ, today)
             icon = cfg["icon"]
             if key in existing:
@@ -315,7 +321,36 @@ def sync():
                 create_page(props, icon=icon)
                 created += 1
 
-    print(f"Done. Created {created}, updated {updated}, skipped {skipped}.")
+    # Purge stale recurring entries: any calendar page marked as recurring
+    # that no longer corresponds to a desired (name, date) occurrence.
+    archived = _purge_stale(calendar_pages, desired_keys)
+
+    print(f"Done. Created {created}, updated {updated}, archived {archived}, "
+          f"skipped {skipped}.")
+
+
+def _purge_stale(calendar_pages, desired_keys):
+    archived = 0
+    for page in calendar_pages:
+        # Skip pages that are already archived / in trash.
+        if page.get("archived") or page.get("in_trash"):
+            continue
+        props = page["properties"]
+        # Only consider entries flagged as recurring — manual entries are
+        # always left untouched.
+        is_recurring = props.get("Is Recurring", {}).get("checkbox", False)
+        if not is_recurring:
+            continue
+        name = _title_text(props["Event Name"])
+        d = _date_start(props["Date"])
+        if not name or not d:
+            continue
+        key = (name, d.isoformat())
+        if key not in desired_keys:
+            archive_page(page["id"])
+            archived += 1
+            print(f"  Archived stale occurrence: {name} @ {d.isoformat()}")
+    return archived
 
 
 if __name__ == "__main__":