diff --git a/apps/blog/src/pages/feed.xml.ts b/apps/blog/src/pages/feed.xml.ts
index b564cce..a1d99db 100644
--- a/apps/blog/src/pages/feed.xml.ts
+++ b/apps/blog/src/pages/feed.xml.ts
@@ -5,6 +5,7 @@ import bookmarksRaw from '../data/bookmarks.yaml?raw';
 import fs from 'node:fs';
 import path from 'node:path';
 import type { APIContext } from 'astro';
+import { getGitDate } from '../utils';
 
 interface Bookmark {
   date: string;
@@ -14,7 +15,7 @@ interface Bookmark {
 
 interface TxtFile {
   name: string;
-  mtime: Date;
+  date: Date;
 }
 
 export async function GET(context: APIContext) {
@@ -27,7 +28,7 @@ export async function GET(context: APIContext) {
         .filter(file => file.endsWith('.txt'))
         .map(name => ({
           name,
-          mtime: fs.statSync(path.join(txtDir, name)).mtime,
+          date: getGitDate(path.join(txtDir, name)),
         }))
     : [];
 
@@ -40,7 +41,7 @@ export async function GET(context: APIContext) {
     })),
     ...txtFiles.map(txt => ({
       title: txt.name,
-      pubDate: txt.mtime,
+      pubDate: txt.date,
       link: `/txt/${txt.name}`,
       description: txt.name,
     })),
diff --git a/apps/blog/src/pages/index.astro b/apps/blog/src/pages/index.astro
index babf6e3..c5e8e5d 100644
--- a/apps/blog/src/pages/index.astro
+++ b/apps/blog/src/pages/index.astro
@@ -5,8 +5,8 @@ import yaml from 'js-yaml';
 import bookmarksRaw from '../data/bookmarks.yaml?raw';
 import fs from 'node:fs';
 import path from 'node:path';
-import { execSync } from 'node:child_process';
 import { getApprovedEntries, type GuestbookEntry } from '../lib/db';
+import { getGitDate } from '../utils';
 
 interface Bookmark {
   date: string;
@@ -24,15 +24,6 @@ interface TxtConfig {
   pinned?: string[];
 }
 
-function getGitDate(filePath: string): Date {
-  try {
-    const timestamp = execSync(`git log -1 --format=%cI -- "${filePath}"`, { encoding: 'utf8' }).trim();
-    return timestamp ? new Date(timestamp) : new Date(0);
-  } catch {
-    return new Date(0);
-  }
-}
-
 const posts = await getCollection('posts');
 
 // Group by category (default: "posts")
diff --git a/apps/blog/src/pages/txt/index.astro b/apps/blog/src/pages/txt/index.astro
index 2592466..c1bdc40 100644
--- a/apps/blog/src/pages/txt/index.astro
+++ b/apps/blog/src/pages/txt/index.astro
@@ -2,8 +2,8 @@
 import Layout from '../../layouts/Layout.astro';
 import fs from 'node:fs';
 import path from 'node:path';
-import { execSync } from 'node:child_process';
 import yaml from 'js-yaml';
+import { getGitDate } from '../../utils';
 
 interface TxtFile {
   name: string;
@@ -15,15 +15,6 @@ interface TxtConfig {
   pinned?: string[];
 }
 
-function getGitDate(filePath: string): Date {
-  try {
-    const timestamp = execSync(`git log -1 --format=%cI -- "${filePath}"`, { encoding: 'utf8' }).trim();
-    return timestamp ? new Date(timestamp) : new Date(0);
-  } catch {
-    return new Date(0);
-  }
-}
-
 const txtDir = path.join(process.cwd(), 'public/txt');
 const configPath = path.join(txtDir, 'config.yaml');
 const config: TxtConfig = fs.existsSync(configPath)
diff --git a/apps/blog/src/utils.ts b/apps/blog/src/utils.ts
new file mode 100644
index 0000000..8f61965
--- /dev/null
+++ b/apps/blog/src/utils.ts
@@ -0,0 +1,10 @@
+import { execSync } from 'node:child_process';
+
+export function getGitDate(filePath: string): Date {
+  try {
+    const timestamp = execSync(`git log -1 --format=%cI -- "${filePath}"`, { encoding: 'utf8' }).trim();
+    return timestamp ? new Date(timestamp) : new Date(0);
+  } catch {
+    return new Date(0);
+  }
+}