Format excel date cells as date for import/export

app/Abstracts/Export.php

@@ -9,6 +9,7 @@ use Maatwebsite\Excel\Concerns\ShouldAutoSize;
 use Maatwebsite\Excel\Concerns\WithHeadings;
 use Maatwebsite\Excel\Concerns\WithMapping;
 use Maatwebsite\Excel\Concerns\WithTitle;
+use PhpOffice\PhpSpreadsheet\Shared\Date as ExcelDate;
 
 abstract class Export implements FromCollection, ShouldAutoSize, WithHeadings, WithMapping, WithTitle
 {
@@ -41,7 +42,7 @@ abstract class Export implements FromCollection, ShouldAutoSize, WithHeadings, W
             $value = $model->$field;
 
             if (in_array($field, $date_fields)) {
-                $value = Date::parse($value)->format('Y-m-d');
+                $value = ExcelDate::PHPToExcel(Date::parse($value)->format('Y-m-d'));
             }
 
             // Prevent CSV injection https://security.stackexchange.com/a/190848

app/Abstracts/Import.php

@@ -17,6 +17,7 @@ use Maatwebsite\Excel\Concerns\WithMapping;
 use Maatwebsite\Excel\Concerns\WithValidation;
 use Maatwebsite\Excel\Validators\Failure;
 use Illuminate\Support\Facades\Validator;
+use PhpOffice\PhpSpreadsheet\Shared\Date as ExcelDate;
 
 abstract class Import implements ToModel, SkipsOnError, SkipsOnFailure, WithBatchInserts, WithChunkReading, WithHeadingRow, WithMapping, WithValidation
 {
@@ -44,7 +45,7 @@ abstract class Import implements ToModel, SkipsOnError, SkipsOnFailure, WithBatc
                 continue;
             }
 
-            $row[$date_field] = Date::parse($row[$date_field])->format('Y-m-d H:i:s');
+            $row[$date_field] = Date::parse(ExcelDate::excelToDateTimeObject($row[$date_field]))->format('Y-m-d H:i:s');
         }
 
         return $row;

app/Imports/Banking/Transfers.php

@@ -7,6 +7,8 @@ use App\Models\Banking\Transaction;
 use App\Models\Banking\Transfer as Model;
 use App\Models\Setting\Category;
 use App\Traits\Currencies;
+use App\Utilities\Date;
+use PhpOffice\PhpSpreadsheet\Shared\Date as ExcelDate;
 
 class Transfers extends Import
 {
@@ -21,6 +23,7 @@ class Transfers extends Import
     {
         $row = parent::map($row);
 
+        $row['transferred_at'] = Date::parse(ExcelDate::excelToDateTimeObject($row['transferred_at']))->format('Y-m-d');
         $row['from_account_id'] = $this->getFromAccountId($row);
         $row['to_account_id'] = $this->getToAccountId($row);
         $row['expense_transaction_id'] = $this->getExpenseTransactionId($row);