Use date-fns for parsing pubDate, use Date instead of string

src/content/config.ts

@@ -1,11 +1,16 @@
 import { z, defineCollection } from 'astro:content';
+import { parse } from 'date-fns';
 
 const blogCollection = defineCollection({
   type: 'content', // v2.5.0 and later
   schema: z.object({
     title: z.string(),
     description: z.string(),
-    pubDate: z.string(),
+    pubDate: z.string().transform((date) => 
+      z.date().parse(
+        parse(date, 'yyyy-MM-dd HH:mm:ss XXXX', new Date())
+      )
+    ),
     tags: z.array(z.string()),
     preview_image: z.string().optional(),
   }),

src/pages/index.astro

@@ -11,7 +11,7 @@ const posts = await getCollection("blog");
       <Summary
         url={`/posts/${post.slug}`}
         description={post.data.description}
-        date={new Date()}
+        date={post.data.pubDate}
         title={post.data.title}
         tags={post.data.tags}
       />