diff --git a/src/Command/ImportProjectCommand.php b/src/Command/ImportProjectCommand.php
index 4582860d..292d3ad7 100644
--- a/src/Command/ImportProjectCommand.php
+++ b/src/Command/ImportProjectCommand.php
@@ -14,6 +14,7 @@ use App\Importer\ImporterService;
 use App\Importer\ImportNotFoundException;
 use App\Repository\TeamRepository;
 use App\Repository\UserRepository;
+use App\Validator\ValidationFailedException;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\ProgressBar;
 use Symfony\Component\Console\Input\InputArgument;
@@ -56,6 +57,8 @@ class ImportProjectCommand extends Command
             ->addOption('reader', null, InputOption::VALUE_REQUIRED, 'The reader to use (supported: csv, csv-semicolon)', 'csv')
             ->addOption('teamlead', null, InputOption::VALUE_REQUIRED, 'If you want to create empty teams for each project, give the username of the teamlead to be assigned')
             ->addOption('no-update', null, InputOption::VALUE_NONE, 'If you want to create new project, but not update existing ones')
+            ->addOption('date-format', null, InputOption::VALUE_REQUIRED, 'Date format for imports', 'Y-m-d')
+            ->addOption('timezone', null, InputOption::VALUE_REQUIRED, 'Timezone for imports', date_default_timezone_get())
         ;
     }
 
@@ -125,9 +128,17 @@ class ImportProjectCommand extends Command
 
         $progressBar = new ProgressBar($output, $amount);
 
+        $options = [];
+        if (null !== ($dateFormat = $input->getOption('date-format'))) {
+            $options['dateformat'] = $dateFormat;
+        }
+        if (null !== ($timezone = $input->getOption('timezone'))) {
+            $options['timezone'] = $timezone;
+        }
+
         foreach ($records as $record) {
             try {
-                $projects[] = $importer->convertEntryToProject($record);
+                $projects[] = $importer->convertEntryToProject($record, $options);
             } catch (\Exception $ex) {
                 $io->error(sprintf('Invalid row %s: %s', $row, $ex->getMessage()));
                 $doImport = false;
@@ -158,7 +169,6 @@ class ImportProjectCommand extends Command
         $progressBar = new ProgressBar($output, $amount);
 
         foreach ($projects as $project) {
-            $row++;
             $progressBar->advance();
             try {
                 if ($project->getCustomer()->getId() === null) {
@@ -194,8 +204,16 @@ class ImportProjectCommand extends Command
 
                 $this->teams->saveTeam($team);
                 $createdTeams++;
+            } catch (ValidationFailedException $ex) {
+                $io->error(sprintf('Failed importing project "%s" with: %s', $project->getName(), $ex->getMessage()));
+                for ($i = 0; $i < $ex->getViolations()->count(); $i++) {
+                    $violation = $ex->getViolations()->get($i);
+                    $io->error(sprintf('Failed validating field "%s" with value "%s": %s', $violation->getPropertyPath(), $violation->getInvalidValue(), $violation->getMessage()));
+                }
+
+                return 4;
             } catch (\Exception $ex) {
-                $io->error(sprintf('Failed importing project row %s with: %s', $row, $ex->getMessage()));
+                $io->error(sprintf('Failed importing project "%s" with: %s', $project->getName(), $ex->getMessage()));
 
                 return 4;
             }
diff --git a/src/Importer/AbstractProjectImporter.php b/src/Importer/AbstractProjectImporter.php
index 90046a7f..bd33d056 100644
--- a/src/Importer/AbstractProjectImporter.php
+++ b/src/Importer/AbstractProjectImporter.php
@@ -39,11 +39,11 @@ abstract class AbstractProjectImporter implements ProjectImporterInterface
         return $this->customerService->findCustomerByName($name);
     }
 
-    public function convertEntryToProject(array $entry): Project
+    public function convertEntryToProject(array $entry, array $options = []): Project
     {
         $project = $this->findProject($entry);
 
-        $this->convertEntry($project, $entry);
+        $this->convertEntry($project, $entry, $options);
 
         return $project;
     }
@@ -71,7 +71,7 @@ abstract class AbstractProjectImporter implements ProjectImporterInterface
         if ($customer->getId() !== $project->getCustomer()->getId()) {
             throw new \InvalidArgumentException(
                 sprintf(
-                    'Customer mismatch for project %s with attached customer %s and new customer %s',
+                    'Customer mismatch for project "%s" with attached customer "%s" and new customer "%s"',
                     $project->getName(),
                     $project->getCustomer()->getName(),
                     $customer->getName()
@@ -84,7 +84,10 @@ abstract class AbstractProjectImporter implements ProjectImporterInterface
 
     private function findCustomer(string $customerName): Customer
     {
-        if (!\array_key_exists($customerName, $this->customerCache)) {
+        $customerName = trim($customerName);
+        $key = strtolower($customerName);
+
+        if (!\array_key_exists($key, $this->customerCache)) {
             $customer = $this->findCustomerByName($customerName);
 
             if ($customer === null) {
@@ -92,10 +95,10 @@ abstract class AbstractProjectImporter implements ProjectImporterInterface
                 $customer->setName($customerName);
             }
 
-            $this->customerCache[$customerName] = $customer;
+            $this->customerCache[$key] = $customer;
         }
 
-        return $this->customerCache[$customerName];
+        return $this->customerCache[$key];
     }
 
     /**
@@ -152,7 +155,8 @@ abstract class AbstractProjectImporter implements ProjectImporterInterface
      *
      * @param Project $project
      * @param array $entry
-     * @return mixed
+     * @param array $options
+     * @return void
      */
-    abstract protected function convertEntry(Project $project, array $entry);
+    abstract protected function convertEntry(Project $project, array $entry, array $options = []): void;
 }
diff --git a/src/Importer/DefaultProjectImporter.php b/src/Importer/DefaultProjectImporter.php
index e01ccea6..fe5c2f98 100644
--- a/src/Importer/DefaultProjectImporter.php
+++ b/src/Importer/DefaultProjectImporter.php
@@ -14,7 +14,7 @@ use App\Entity\ProjectMeta;
 
 final class DefaultProjectImporter extends AbstractProjectImporter
 {
-    protected function convertEntry(Project $project, array $row)
+    protected function convertEntry(Project $project, array $row, array $options = []): void
     {
         foreach ($row as $name => $value) {
             switch (strtolower($name)) {
@@ -33,7 +33,7 @@ final class DefaultProjectImporter extends AbstractProjectImporter
                 case 'order-number':
                 case 'order number':
                     if (!empty($value)) {
-                        $project->setOrderNumber($value);
+                        $project->setOrderNumber(substr($value, 0, 20));
                     }
                 break;
 
@@ -42,8 +42,20 @@ final class DefaultProjectImporter extends AbstractProjectImporter
                 case 'order date':
                     if (!empty($value)) {
                         $timezone = $project->getCustomer()->getTimezone();
+                        if (isset($options['timezone'])) {
+                            $timezone = $options['timezone'];
+                        }
                         $timezone = new \DateTimeZone($timezone ?? date_default_timezone_get());
-                        $project->setOrderDate(new \DateTime($value, $timezone));
+                        if (isset($options['dateformat'])) {
+                            $date = \DateTime::createFromFormat($options['dateformat'], $value, $timezone);
+                        } else {
+                            $date = new \DateTime($value, $timezone);
+                        }
+                        if ($date instanceof \DateTime) {
+                            $project->setOrderDate($date);
+                        } else {
+                            throw new \InvalidArgumentException('Invalid order date: ' . $value);
+                        }
                     }
                 break;
 
@@ -84,7 +96,5 @@ final class DefaultProjectImporter extends AbstractProjectImporter
                 break;
             }
         }
-
-        return $project;
     }
 }
diff --git a/src/Importer/ProjectImporterInterface.php b/src/Importer/ProjectImporterInterface.php
index 16006ac3..aa47a80a 100644
--- a/src/Importer/ProjectImporterInterface.php
+++ b/src/Importer/ProjectImporterInterface.php
@@ -13,5 +13,13 @@ use App\Entity\Project;
 
 interface ProjectImporterInterface
 {
-    public function convertEntryToProject(array $entry): Project;
+    /**
+     * Convert an entry (key-value pairs) to a Project entity.
+     * Accepts an optional array of options (like "dateformat" or "timezone").
+     *
+     * @param array<string, mixed> $entry
+     * @param array<string, mixed> $options
+     * @return Project
+     */
+    public function convertEntryToProject(array $entry, array $options = []): Project;
 }