diff --git a/backend/src/services/TimefixService.js b/backend/src/services/TimefixService.js
index 4216dcc..106cc81 100644
--- a/backend/src/services/TimefixService.js
+++ b/backend/src/services/TimefixService.js
@@ -282,9 +282,21 @@ class TimefixService {
     }
     
     // Erstelle die korrigierte Zeit als Date-Objekt
+    // WICHTIG: Frontend sendet lokale Zeit, DB erwartet UTC
     const [newHours, newMinutes] = newTime.split(':').map(Number);
     const [newYear, newMonth, newDay] = newDate.split('-').map(Number);
-    const correctedDateTime = new Date(newYear, newMonth - 1, newDay, newHours, newMinutes, 0);
+    
+    // Erstelle lokales Date-Objekt
+    const localDateTime = new Date(newYear, newMonth - 1, newDay, newHours, newMinutes, 0);
+    
+    // Konvertiere zu UTC-String für die Datenbank (Format: YYYY-MM-DD HH:MM:SS)
+    const utcYear = localDateTime.getUTCFullYear();
+    const utcMonth = String(localDateTime.getUTCMonth() + 1).padStart(2, '0');
+    const utcDay = String(localDateTime.getUTCDate()).padStart(2, '0');
+    const utcHours = String(localDateTime.getUTCHours()).padStart(2, '0');
+    const utcMinutes = String(localDateTime.getUTCMinutes()).padStart(2, '0');
+    const utcSeconds = String(localDateTime.getUTCSeconds()).padStart(2, '0');
+    const correctedDateTime = `${utcYear}-${utcMonth}-${utcDay} ${utcHours}:${utcMinutes}:${utcSeconds}`;
     
     // Prüfe ob bereits ein Timefix existiert
     const existingTimefix = await Timefix.findOne({