diff --git a/app/Http/Resources/RoomResource.php b/app/Http/Resources/RoomResource.php
index acfc44c..73c2994 100644
--- a/app/Http/Resources/RoomResource.php
+++ b/app/Http/Resources/RoomResource.php
@@ -23,6 +23,19 @@ class RoomResource extends JsonResource
 
     protected function formatTaipei(?Carbon $value): ?string
     {
-        return $value ? $value->timezone('Asia/Taipei')->format('Y-m-d H:i:s') : null;
+        if ($value instanceof \Carbon\Carbon) {
+            return $value->timezone('Asia/Taipei')->format('Y-m-d H:i:s');
+        }
+
+        // 如果已經是字串（例如 JSON 解開的資料）
+        if (is_string($value)) {
+            try {
+                return \Carbon\Carbon::parse($value)->timezone('Asia/Taipei')->format('Y-m-d H:i:s');
+            } catch (\Throwable $e) {
+                return null;
+            }
+        }
+
+        return null;
     }
 }