diff --git a/src/lib/sort.ts b/src/lib/sort.ts
index 2393a3b..5905e59 100644
--- a/src/lib/sort.ts
+++ b/src/lib/sort.ts
@@ -2,16 +2,33 @@ import type { CollectionEntry } from 'astro:content';
 
 type Post = CollectionEntry<'posts'>;
 
+/**
+ * Newest-first ordering for listings.
+ *
+ * Ordered by `pubDate` — the date the listing actually *renders* — so the
+ * visible order always matches the visible dates. `updatedDate` is only a
+ * tiebreak, for stable ordering when two posts share a publish date.
+ *
+ * Do NOT sort by `updatedDate ?? pubDate` here: listings display `pubDate`,
+ * so a revised-and-backdated post would sort by a date it never shows and the
+ * list would read out of order (e.g. "January 7, 2026" appearing above
+ * "September 13, 2026").
+ */
+export function sortForListing(posts: Post[]): Post[] {
+  return [...posts].sort((a, b) => {
+    const byPub = b.data.pubDate.valueOf() - a.data.pubDate.valueOf();
+    if (byPub !== 0) return byPub;
+    const aUpd = a.data.updatedDate?.valueOf() ?? 0;
+    const bUpd = b.data.updatedDate?.valueOf() ?? 0;
+    return bUpd - aUpd;
+  });
+}
+
 /**
  * Effective "last updated" timestamp for a post — `updatedDate` when present,
- * else `pubDate`. Used to sort listings newest-first by *update time*, so a
- * revised post resurfaces to the top.
+ * else `pubDate`. Used where *recency of editing* is what matters (e.g.
+ * deciding whether a post resurfaced), NOT for rendering order.
  */
 export function updatedAt(post: Post): Date {
   return post.data.updatedDate ?? post.data.pubDate;
 }
-
-/** Sort posts newest-first by update time (updatedDate ?? pubDate). */
-export function sortByUpdated(posts: Post[]): Post[] {
-  return [...posts].sort((a, b) => updatedAt(b).valueOf() - updatedAt(a).valueOf());
-}
diff --git a/src/pages/categories/[category].astro b/src/pages/categories/[category].astro
index 0187904..3750440 100644
--- a/src/pages/categories/[category].astro
+++ b/src/pages/categories/[category].astro
@@ -5,7 +5,7 @@ import PostList from '../../components/PostList.astro';
 import CategoryArt from '../../components/CategoryArt.astro';
 import { getCollection } from 'astro:content';
 import { isEn } from '../../lib/lang';
-import { sortByUpdated } from '../../lib/sort';
+import { sortForListing } from '../../lib/sort';
 import { categoryMeta } from '../../lib/categories';
 
 export async function getStaticPaths() {
@@ -17,7 +17,7 @@ export async function getStaticPaths() {
 const { category } = Astro.params;
 const meta = categoryMeta(category as string);
 
-const posts = sortByUpdated(
+const posts = sortForListing(
   (await getCollection('posts', isEn)).filter((p) => p.data.category === category),
 );
 
diff --git a/src/pages/index.astro b/src/pages/index.astro
index da864b9..9763541 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -4,9 +4,9 @@ import PostList from '../components/PostList.astro';
 import { getCollection } from 'astro:content';
 import { isEn } from '../lib/lang';
 import { SITE } from '../config';
-import { sortByUpdated } from '../lib/sort';
+import { sortForListing } from '../lib/sort';
 
-const posts = sortByUpdated(await getCollection('posts', isEn));
+const posts = sortForListing(await getCollection('posts', isEn));
 ---
 
 <BaseLayout title={SITE.title} description={SITE.description} altLocaleUrl={`${SITE.url}/zh/`}>
diff --git a/src/pages/posts/index.astro b/src/pages/posts/index.astro
index 66bd8e9..3ec7f91 100644
--- a/src/pages/posts/index.astro
+++ b/src/pages/posts/index.astro
@@ -3,10 +3,10 @@ import BaseLayout from '../../layouts/BaseLayout.astro';
 import PostList from '../../components/PostList.astro';
 import { getCollection } from 'astro:content';
 import { isEn } from '../../lib/lang';
-import { sortByUpdated } from '../../lib/sort';
+import { sortForListing } from '../../lib/sort';
 import { SITE } from '../../config';
 
-const posts = sortByUpdated(await getCollection('posts', isEn));
+const posts = sortForListing(await getCollection('posts', isEn));
 ---
 
 <BaseLayout
diff --git a/src/pages/zh/categories/[category].astro b/src/pages/zh/categories/[category].astro
index 67fa982..3ab8eec 100644
--- a/src/pages/zh/categories/[category].astro
+++ b/src/pages/zh/categories/[category].astro
@@ -5,7 +5,7 @@ import PostList from '../../../components/PostList.astro';
 import CategoryArt from '../../../components/CategoryArt.astro';
 import { getCollection } from 'astro:content';
 import { isZh } from '../../../lib/lang';
-import { sortByUpdated } from '../../../lib/sort';
+import { sortForListing } from '../../../lib/sort';
 import { categoryMeta } from '../../../lib/categories';
 
 export async function getStaticPaths() {
@@ -17,7 +17,7 @@ export async function getStaticPaths() {
 const { category } = Astro.params;
 const meta = categoryMeta(category as string);
 
-const posts = sortByUpdated(
+const posts = sortForListing(
   (await getCollection('posts', isZh)).filter((p) => p.data.category === category),
 );
 
diff --git a/src/pages/zh/index.astro b/src/pages/zh/index.astro
index 72ecec7..c916c81 100644
--- a/src/pages/zh/index.astro
+++ b/src/pages/zh/index.astro
@@ -4,9 +4,9 @@ import PostList from '../../components/PostList.astro';
 import { getCollection } from 'astro:content';
 import { isZh } from '../../lib/lang';
 import { SITE } from '../../config';
-import { sortByUpdated } from '../../lib/sort';
+import { sortForListing } from '../../lib/sort';
 
-const posts = sortByUpdated(await getCollection('posts', isZh));
+const posts = sortForListing(await getCollection('posts', isZh));
 ---
 
 <BaseLayout