diff --git a/src/content/cats/maciejpedzich-placeholder.json b/src/content/cats/maciejpedzich-placeholder.json
index 473989c..1d7b4ec 100644
--- a/src/content/cats/maciejpedzich-placeholder.json
+++ b/src/content/cats/maciejpedzich-placeholder.json
@@ -1,5 +1,6 @@
 {
   "name": "Placeholder",
+  "dateAdded": "2023-09-02T18:50:00.066Z",
   "description": "This is a placeholder cat with a photo taken from placekitten.com",
   "image": {
     "src": "/images/maciejpedzich-placeholder.jpg",
diff --git a/src/content/config.ts b/src/content/config.ts
index 012ecc6..6f680bf 100644
--- a/src/content/config.ts
+++ b/src/content/config.ts
@@ -4,6 +4,10 @@ const cats = defineCollection({
   type: 'data',
   schema: z.object({
     name: z.string(),
+    dateAdded: z
+      .string()
+      .or(z.date())
+      .transform((val) => new Date(val)),
     description: z.string().max(250),
     image: z.object({
       src: z.string(),