diff --git a/services/notificationService.js b/services/notificationService.js
index 582bbe0..5d98f16 100644
--- a/services/notificationService.js
+++ b/services/notificationService.js
@@ -1,6 +1,7 @@
 const axios = require('axios');
 const adminConfig = require('./adminConfig');
 const { readNotificationSettings } = require('./userSettingsStore');
+const DISPLAY_TIME_ZONE = 'Europe/Berlin';
 
 function formatDateLabel(dateInput) {
   try {
@@ -14,7 +15,8 @@ function formatDateLabel(dateInput) {
       month: '2-digit',
       day: '2-digit',
       hour: '2-digit',
-      minute: '2-digit'
+      minute: '2-digit',
+      timeZone: DISPLAY_TIME_ZONE
     });
   } catch (_error) {
     return 'unbekanntes Datum';
@@ -30,7 +32,8 @@ function formatDateOnly(dateInput) {
     return date.toLocaleDateString('de-DE', {
       day: '2-digit',
       month: '2-digit',
-      year: 'numeric'
+      year: 'numeric',
+      timeZone: DISPLAY_TIME_ZONE
     });
   } catch (_error) {
     return 'unbekanntes Datum';