diff --git a/src/utils/date.spec.ts b/src/utils/date.spec.ts
index 362a95ddd3f19e77f2df83078570cb94b80a1a55..02bf7c5d46120e7ab9c03040da5114b776614abe 100644
--- a/src/utils/date.spec.ts
+++ b/src/utils/date.spec.ts
@@ -449,7 +449,7 @@ describe('date utils', () => {
       })
       jest
         .spyOn(DateTime, 'local')
-        .mockReturnValue(now.set({ month: 9, day: 21 }))
+        .mockReturnValue(now.set({ month: 6, day: 21 }))
       const currentSeason = getCurrentSeason()
       expect(currentSeason).toEqual(Season.SUMMER)
     })
@@ -459,7 +459,7 @@ describe('date utils', () => {
       })
       jest
         .spyOn(DateTime, 'local')
-        .mockReturnValue(now.set({ month: 3, day: 31 }))
+        .mockReturnValue(now.set({ month: 3, day: 30 }))
       const currentSeason = getCurrentSeason()
       expect(currentSeason).toEqual(Season.WINTER)
     })
diff --git a/src/utils/date.ts b/src/utils/date.ts
index 9468ee8f43ebba8267546b22958443b2f3b43807..d545d7b9de8446116297f0fd333cdb245a6ed596 100644
--- a/src/utils/date.ts
+++ b/src/utils/date.ts
@@ -3,18 +3,6 @@ import { DateTime } from 'luxon'
 import { Dataload } from 'models'
 import { getMonthNameWithPrep } from './utils'
 
-/** Between 21st of June and 20th of September */
-export const SUMMER_WEEK_DATES = {
-  start: 25,
-  end: 38,
-} as const
-
-/** Between 31st of October and 30th of March */
-const WINTER_WEEK_DATES = {
-  start: 44,
-  end: 13,
-} as const
-
 export function compareDates(dateA: DateTime, dateB: DateTime) {
   return dateA < dateB ? -1 : 1
 }
@@ -165,17 +153,18 @@ export const getActualAnalysisDate = (): DateTime => {
  * - Otherwise returns null.
  */
 export function getCurrentSeason() {
-  const weekNumber = DateTime.local().weekNumber
-  if (
-    weekNumber >= SUMMER_WEEK_DATES.start &&
-    weekNumber <= SUMMER_WEEK_DATES.end
-  ) {
-    return Season.SUMMER
+  const now = DateTime.local().setZone('utc', { keepLocalTime: true })
+  const month = now.month
+  const day = now.day
+
+  if ((month >= 10 && day >= 31) || (month <= 3 && day <= 31)) {
+    return Season.WINTER
   } else if (
-    weekNumber >= WINTER_WEEK_DATES.start ||
-    weekNumber <= WINTER_WEEK_DATES.end
+    (month === 6 && day >= 21) ||
+    (month >= 7 && month <= 8) ||
+    (month === 9 && day <= 20)
   ) {
-    return Season.WINTER
+    return Season.SUMMER
   }
   return null
 }
diff --git a/tests/__mocks__/profileType.mock.ts b/tests/__mocks__/profileType.mock.ts
index 5a0c69dc5379ace77c0935f65c821072e9831102..8e522e83d74d49d29b72687386363c780c2bf5b1 100644
--- a/tests/__mocks__/profileType.mock.ts
+++ b/tests/__mocks__/profileType.mock.ts
@@ -71,9 +71,9 @@ export const mockMonthElectricSpecificConsumption = 175
 
 export const mockMonthColdWaterConsumption = 4247
 export const mockWaterRawNeeds = 2480
-export const mockWaterSpreadNeeds = 2708
+export const mockWaterSpreadNeeds = 2701
 export const mockMonthEcsConsumptionOther = 166
-export const mockMonthEcsConsumptionThermo = 111
+export const mockMonthEcsConsumptionThermo = 110
 
 export const mockProfileType1: ProfileType = {
   housingType: HousingType.APARTMENT,
@@ -100,7 +100,7 @@ export const mockProfileType1: ProfileType = {
 // For the month of February
 export const mockMonthConsumption1 = 1174
 
-export const mockMonthEcsConsumption1Solar = 135
+export const mockMonthEcsConsumption1Solar = 134
 
 export const mockProfileType2: ProfileType = {
   housingType: HousingType.INDIVIDUAL_HOUSE,
@@ -180,17 +180,17 @@ export const mockMonthlyForecastJanuaryTestProfile1: MonthlyForecast = {
       detailsMonthlyForecast: {
         coldWaterConsumption: null,
         cookingConsumption: 85,
-        ecsConsumption: 291,
+        ecsConsumption: 290,
         electricSpecificConsumption: null,
         heatingConsumption: null,
       },
       fluidType: 2,
-      load: 376,
-      value: 94.602,
+      load: 375,
+      value: 94.35,
     },
   ],
   month: 1,
-  totalValue: 4938.102,
+  totalValue: 4937.85,
 }
 
 export const mockTestProfile2: ProfileType = {
@@ -222,13 +222,13 @@ export const mockMonthlyForecastJanuaryTestProfile2: MonthlyForecast = {
       detailsMonthlyForecast: {
         coldWaterConsumption: null,
         cookingConsumption: 34,
-        ecsConsumption: 249,
+        ecsConsumption: 248,
         electricSpecificConsumption: 151,
         heatingConsumption: 1237,
       },
       fluidType: 0,
-      load: 1671,
-      value: 420.42,
+      load: 1670,
+      value: 420.17,
     },
     {
       detailsMonthlyForecast: {
@@ -256,7 +256,7 @@ export const mockMonthlyForecastJanuaryTestProfile2: MonthlyForecast = {
     },
   ],
   month: 1,
-  totalValue: 2557.52,
+  totalValue: 2557.27,
 }
 
 export const mockTestProfile3: ProfileType = {
@@ -453,15 +453,15 @@ export const mockMonthlyForecastJanuaryTest1WithFullArrays: MonthlyForecast = {
       detailsMonthlyForecast: {
         coldWaterConsumption: null,
         cookingConsumption: 85,
-        ecsConsumption: 291,
+        ecsConsumption: 290,
         electricSpecificConsumption: null,
         heatingConsumption: null,
       },
       fluidType: 2,
-      load: 376,
-      value: 94.602,
+      load: 375,
+      value: 94.35,
     },
   ],
   month: 1,
-  totalValue: 4536.842,
+  totalValue: 4536.59,
 }