diff --git a/frontend/src/app/find-my-car/page.tsx b/frontend/src/app/find-my-car/page.tsx
index ac4cd7d..45b6e94 100644
--- a/frontend/src/app/find-my-car/page.tsx
+++ b/frontend/src/app/find-my-car/page.tsx
@@ -56,11 +56,12 @@ export default function FindMyCarPage() {
     loadVehicles();
   }, [user, language]);
 
-  // Format date
+  // Format date (mn uses en-US as mn-MN is not supported in most browsers)
   const formatDate = (dateString: string | null | undefined) => {
     if (!dateString) return '-';
     const date = new Date(dateString);
-    return date.toLocaleDateString(language === 'ko' ? 'ko-KR' : language === 'mn' ? 'mn-MN' : language === 'ru' ? 'ru-RU' : 'en-US', {
+    const locale = language === 'ko' ? 'ko-KR' : language === 'ru' ? 'ru-RU' : 'en-US';
+    return date.toLocaleDateString(locale, {
       year: 'numeric',
       month: 'long',
       day: 'numeric',
diff --git a/frontend/src/app/my-request/page.tsx b/frontend/src/app/my-request/page.tsx
index 338b1b8..77ce258 100644
--- a/frontend/src/app/my-request/page.tsx
+++ b/frontend/src/app/my-request/page.tsx
@@ -50,10 +50,11 @@ export default function MyRequestPage() {
     loadRequests();
   }, [user, language]);
 
-  // Format date
+  // Format date (mn uses en-US as mn-MN is not supported in most browsers)
   const formatDate = (dateString: string) => {
     const date = new Date(dateString);
-    return date.toLocaleDateString(language === 'ko' ? 'ko-KR' : language === 'mn' ? 'mn-MN' : language === 'ru' ? 'ru-RU' : 'en-US', {
+    const locale = language === 'ko' ? 'ko-KR' : language === 'ru' ? 'ru-RU' : 'en-US';
+    return date.toLocaleDateString(locale, {
       year: 'numeric',
       month: 'long',
       day: 'numeric',