diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f21cec7a..a9b5dc8d1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Improved the usability and validation in the cash balance transfer from one to another account
 - Changed the checkboxes to slide toggles in the overview of the admin control panel
+- Switched from the deprecated (`PUT`) to the new endpoint (`POST`) to manage historical market data in the asset profile details dialog of the admin control panel
+- Improved the date parsing in the import historical market data of the admin control panel
 - Improved the localized meta data (keywords) in `html` files
 - Improved the language localization for German (`de`)
 
diff --git a/apps/api/src/app/admin/admin.controller.ts b/apps/api/src/app/admin/admin.controller.ts
index a19b17d4a..e277e77e4 100644
--- a/apps/api/src/app/admin/admin.controller.ts
+++ b/apps/api/src/app/admin/admin.controller.ts
@@ -7,7 +7,10 @@ import {
   GATHER_ASSET_PROFILE_PROCESS,
   GATHER_ASSET_PROFILE_PROCESS_OPTIONS
 } from '@ghostfolio/common/config';
-import { getAssetProfileIdentifier } from '@ghostfolio/common/helper';
+import {
+  getAssetProfileIdentifier,
+  resetHours
+} from '@ghostfolio/common/helper';
 import {
   AdminData,
   AdminMarketData,
@@ -331,9 +334,9 @@ export class AdminController {
     const dataBulkUpdate: Prisma.MarketDataUpdateInput[] = data.marketData.map(
       ({ date, marketPrice }) => ({
         dataSource,
-        date,
         marketPrice,
         symbol,
+        date: resetHours(parseISO(date)),
         state: 'CLOSE'
       })
     );
diff --git a/apps/api/src/app/admin/update-market-data.dto.ts b/apps/api/src/app/admin/update-market-data.dto.ts
index c0463de31..c2a6de11e 100644
--- a/apps/api/src/app/admin/update-market-data.dto.ts
+++ b/apps/api/src/app/admin/update-market-data.dto.ts
@@ -1,9 +1,9 @@
-import { IsDate, IsNumber, IsOptional } from 'class-validator';
+import { IsISO8601, IsNumber, IsOptional } from 'class-validator';
 
 export class UpdateMarketDataDto {
-  @IsDate()
+  @IsISO8601()
   @IsOptional()
-  date?: Date;
+  date?: string;
 
   @IsNumber()
   marketPrice: number;
diff --git a/apps/client/src/app/components/admin-market-data-detail/market-data-detail-dialog/market-data-detail-dialog.component.ts b/apps/client/src/app/components/admin-market-data-detail/market-data-detail-dialog/market-data-detail-dialog.component.ts
index dddef0c8f..99fc1abe2 100644
--- a/apps/client/src/app/components/admin-market-data-detail/market-data-detail-dialog/market-data-detail-dialog.component.ts
+++ b/apps/client/src/app/components/admin-market-data-detail/market-data-detail-dialog/market-data-detail-dialog.component.ts
@@ -57,10 +57,16 @@ export class MarketDataDetailDialog implements OnDestroy {
 
   public onUpdate() {
     this.adminService
-      .putMarketData({
+      .postMarketData({
         dataSource: this.data.dataSource,
-        date: this.data.date,
-        marketData: { marketPrice: this.data.marketPrice },
+        marketData: {
+          marketData: [
+            {
+              date: this.data.date.toISOString(),
+              marketPrice: this.data.marketPrice
+            }
+          ]
+        },
         symbol: this.data.symbol
       })
       .pipe(takeUntil(this.unsubscribeSubject))
diff --git a/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts b/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts
index c5c2db17a..5e331ca91 100644
--- a/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts
+++ b/apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.component.ts
@@ -11,7 +11,7 @@ import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
 import { UpdateAssetProfileDto } from '@ghostfolio/api/app/admin/update-asset-profile.dto';
 import { AdminService } from '@ghostfolio/client/services/admin.service';
 import { DataService } from '@ghostfolio/client/services/data.service';
-import { DATE_FORMAT } from '@ghostfolio/common/helper';
+import { DATE_FORMAT, parseDate } from '@ghostfolio/common/helper';
 import {
   AdminMarketDataDetails,
   UniqueAsset
@@ -23,7 +23,7 @@ import {
   MarketData,
   SymbolProfile
 } from '@prisma/client';
-import { format, parseISO } from 'date-fns';
+import { format } from 'date-fns';
 import { parse as csvToJson } from 'papaparse';
 import { Subject } from 'rxjs';
 import { takeUntil } from 'rxjs/operators';
@@ -174,7 +174,7 @@ export class AssetProfileDialog implements OnDestroy, OnInit {
         dataSource: this.data.dataSource,
         marketData: {
           marketData: marketData.map(({ date, marketPrice }) => {
-            return { marketPrice, date: parseISO(date) };
+            return { marketPrice, date: parseDate(date).toISOString() };
           })
         },
         symbol: this.data.symbol
diff --git a/apps/client/src/app/services/admin.service.ts b/apps/client/src/app/services/admin.service.ts
index 4965c6067..042914ee4 100644
--- a/apps/client/src/app/services/admin.service.ts
+++ b/apps/client/src/app/services/admin.service.ts
@@ -2,7 +2,6 @@ import { HttpClient, HttpParams } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { UpdateAssetProfileDto } from '@ghostfolio/api/app/admin/update-asset-profile.dto';
 import { UpdateBulkMarketDataDto } from '@ghostfolio/api/app/admin/update-bulk-market-data.dto';
-import { UpdateMarketDataDto } from '@ghostfolio/api/app/admin/update-market-data.dto';
 import { CreatePlatformDto } from '@ghostfolio/api/app/platform/create-platform.dto';
 import { UpdatePlatformDto } from '@ghostfolio/api/app/platform/update-platform.dto';
 import { CreateTagDto } from '@ghostfolio/api/app/tag/create-tag.dto';
@@ -247,25 +246,6 @@ export class AdminService {
     return this.http.post<Tag>(`/api/v1/tag`, aTag);
   }
 
-  public putMarketData({
-    dataSource,
-    date,
-    marketData,
-    symbol
-  }: {
-    dataSource: DataSource;
-    date: Date;
-    marketData: UpdateMarketDataDto;
-    symbol: string;
-  }) {
-    const url = `/api/v1/admin/market-data/${dataSource}/${symbol}/${format(
-      date,
-      DATE_FORMAT
-    )}`;
-
-    return this.http.put<MarketData>(url, marketData);
-  }
-
   public putPlatform(aPlatform: UpdatePlatformDto) {
     return this.http.put<Platform>(
       `/api/v1/platform/${aPlatform.id}`,