diff --git a/backend/src/routes/staff/time.ts b/backend/src/routes/staff/time.ts
index edaddbc..75afdb4 100644
--- a/backend/src/routes/staff/time.ts
+++ b/backend/src/routes/staff/time.ts
@@ -388,7 +388,9 @@ export default async function staffTimeRoutes(server: FastifyInstance) {
             const evaluatedUserId = targetUserId || actingUserId;
 
             const startDate = new Date(from);
-            const endDate = new Date(to);
+            let endDateQuery = new Date(to);
+            endDateQuery.setDate(endDateQuery.getDate() + 1);
+            const endDate = endDateQuery;
 
             if (isNaN(startDate.getTime()) || isNaN(endDate.getTime())) {
                 return reply.code(400).send({ error: "Ungültiges Datumsformat." });
diff --git a/frontend/pages/staff/time/[id]/evaluate.vue b/frontend/pages/staff/time/[id]/evaluate.vue
index 32da562..b21e039 100644
--- a/frontend/pages/staff/time/[id]/evaluate.vue
+++ b/frontend/pages/staff/time/[id]/evaluate.vue
@@ -119,8 +119,8 @@ async function loadWorkingTimeInfo() {
 
   // Erstellt Query-Parameter für den neuen Backend-Endpunkt
   const queryParams = new URLSearchParams({
-    from: selectedStartDay.value,
-    to: selectedEndDay.value,
+    from: $dayjs(selectedStartDay.value).format("YYYY-MM-DD"),
+    to: $dayjs(selectedEndDay.value).format("YYYY-MM-DD"),
     targetUserId: evaluatedUserId.value,
   });