diff --git a/apps/api/src/app/portfolio/portfolio.service.ts b/apps/api/src/app/portfolio/portfolio.service.ts
index 9542b4c57..9ea500864 100644
--- a/apps/api/src/app/portfolio/portfolio.service.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.ts
@@ -9,6 +9,7 @@ import {
   PortfolioItem,
   PortfolioOverview
 } from '@ghostfolio/helper/interfaces';
+import { DateRange } from '@ghostfolio/helper/types';
 import { Inject, Injectable } from '@nestjs/common';
 import { REQUEST } from '@nestjs/core';
 import {
@@ -30,7 +31,6 @@ import * as roundTo from 'round-to';
 import { OrderService } from '../order/order.service';
 import { RedisCacheService } from '../redis-cache/redis-cache.service';
 import { UserService } from '../user/user.service';
-import { DateRange } from './interfaces/date-range.type';
 import {
   HistoricalDataItem,
   PortfolioPositionDetail
diff --git a/apps/api/src/models/portfolio.ts b/apps/api/src/models/portfolio.ts
index d557dea97..5143d0d0e 100644
--- a/apps/api/src/models/portfolio.ts
+++ b/apps/api/src/models/portfolio.ts
@@ -7,6 +7,7 @@ import {
   PortfolioReport,
   Position
 } from '@ghostfolio/helper/interfaces';
+import { DateRange } from '@ghostfolio/helper/types';
 import {
   add,
   format,
@@ -28,7 +29,6 @@ import * as roundTo from 'round-to';
 
 import { UserWithSettings } from '../app/interfaces/user-with-settings';
 import { OrderWithAccount } from '../app/order/interfaces/order-with-account.type';
-import { DateRange } from '../app/portfolio/interfaces/date-range.type';
 import { DataProviderService } from '../services/data-provider.service';
 import { ExchangeRateDataService } from '../services/exchange-rate-data.service';
 import { IOrder } from '../services/interfaces/interfaces';
diff --git a/apps/client/src/app/pages/home/home-page.component.ts b/apps/client/src/app/pages/home/home-page.component.ts
index 90b3d242d..aa09949cb 100644
--- a/apps/client/src/app/pages/home/home-page.component.ts
+++ b/apps/client/src/app/pages/home/home-page.component.ts
@@ -1,7 +1,6 @@
 import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core';
 import { MatDialog } from '@angular/material/dialog';
 import { ActivatedRoute, Router } from '@angular/router';
-import { DateRange } from '@ghostfolio/api/app/portfolio/interfaces/date-range.type';
 import { LineChartItem } from '@ghostfolio/client/components/line-chart/interfaces/line-chart.interface';
 import { PerformanceChartDialog } from '@ghostfolio/client/components/performance-chart-dialog/performance-chart-dialog.component';
 import { ToggleOption } from '@ghostfolio/client/components/toggle/interfaces/toggle-option.type';
@@ -19,6 +18,7 @@ import {
   PortfolioPosition
 } from '@ghostfolio/helper/interfaces';
 import { hasPermission, permissions } from '@ghostfolio/helper/permissions';
+import { DateRange } from '@ghostfolio/helper/types';
 import { DeviceDetectorService } from 'ngx-device-detector';
 import { Subject, Subscription } from 'rxjs';
 import { takeUntil } from 'rxjs/operators';
diff --git a/apps/client/src/polyfills.ts b/apps/client/src/polyfills.ts
index 054694fa9..873cf3ef2 100644
--- a/apps/client/src/polyfills.ts
+++ b/apps/client/src/polyfills.ts
@@ -56,9 +56,9 @@
  * Zone JS is required by default for Angular itself.
  */
 import 'zone.js/dist/zone'; // Included with Angular CLI.
+import '@angular/localize/init';
 
 /***************************************************************************************************
  * APPLICATION IMPORTS
  */
 
-import '@angular/localize/init';
diff --git a/apps/api/src/app/portfolio/interfaces/date-range.type.ts b/libs/helper/src/lib/types/date-range.type.ts
similarity index 100%
rename from apps/api/src/app/portfolio/interfaces/date-range.type.ts
rename to libs/helper/src/lib/types/date-range.type.ts
diff --git a/libs/helper/src/lib/types/index.ts b/libs/helper/src/lib/types/index.ts
new file mode 100644
index 000000000..1ef126373
--- /dev/null
+++ b/libs/helper/src/lib/types/index.ts
@@ -0,0 +1,3 @@
+import { DateRange } from './date-range.type';
+
+export { DateRange };