diff --git a/frontend/mockdata/mockData.ts b/frontend/mockdata/mockData.ts
index 367dd6e2..80b9cf8b 100644
--- a/frontend/mockdata/mockData.ts
+++ b/frontend/mockdata/mockData.ts
@@ -17,7 +17,7 @@ const MockWeeklyBookingReadModel: WeeklyBookingReadModel = {
   totalSellableTime: 0,
   totalBillable: 0,
   totalOffered: 0,
-  totalVacationHours: 10,
+  totalVacationHours: 0,
   totalExcludableAbsence: 0,
   totalNotStartedOrQuit: 0,
 };
@@ -79,11 +79,11 @@ export const MockConsultants: ConsultantReadModel[] = [
     department: { id: "mydepartment", name: "My Department" },
     bookings: [
       {
-        year: 2025,
-        weekNumber: 14,
+        year: 2023,
+        weekNumber: 10,
         dateString: "",
         bookingModel: MockWeeklyBookingReadModel,
-        sortableWeek: 202514,
+        sortableWeek: 202310,
       },
     ],
     yearsOfExperience: 23,
diff --git a/frontend/src/components/Forecast/TransformWeekDataToMonth.ts b/frontend/src/components/Forecast/TransformWeekDataToMonth.ts
index 52f057f8..ffdcf923 100644
--- a/frontend/src/components/Forecast/TransformWeekDataToMonth.ts
+++ b/frontend/src/components/Forecast/TransformWeekDataToMonth.ts
@@ -17,12 +17,12 @@ function transformToMonthlyData(weeklyData: BookedHoursPerWeek[]) {
     const { year, weekNumber, bookingModel } = week;
     const monthDistribution = getMonthOfWeek({ week: weekNumber, year: year });
     const primaryMonthKey = `${monthDistribution.year}-${String(
-      monthDistribution.month + 1,
+      monthDistribution.month,
     ).padStart(2, "0")}`;
     const secondaryMonthKey =
       monthDistribution.secondMonth !== undefined
         ? `${monthDistribution.year}-${String(
-            monthDistribution.secondMonth + 1,
+            monthDistribution.secondMonth,
           ).padStart(2, "0")}`
         : null;
 
@@ -76,6 +76,7 @@ function transformToMonthlyData(weeklyData: BookedHoursPerWeek[]) {
       addToMonthlyData(secondaryMonthKey, secondaryBookingModel!);
     }
   });
+  console.log("monthlyData", Object.values(monthlyData));
   return Object.values(monthlyData);
 }