(fix) default timezone for export

Signed-off-by: Andrii Ilkiv <[email protected]>

lib/Service/SubmissionService.php

@@ -36,6 +36,7 @@
 use OCA\Forms\Db\QuestionMapper;
 use OCA\Forms\Db\SubmissionMapper;
 use OCA\Forms\Db\UploadedFileMapper;
+use OCA\DAV\CalDAV\TimezoneService;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\OCS\OCSException;
 use OCP\Files\File;
@@ -75,6 +76,7 @@ public function __construct(
 		private ITempManager $tempManager,
 		private FormsService $formsService,
 		private IUrlGenerator $urlGenerator,
+		private TimezoneService $timezoneService,
 	) {
 		$this->currentUser = $userSession->getUser();
 	}
@@ -207,7 +209,7 @@ public function getSubmissionsData(Form $form, string $fileFormat, ?File $file =
 		$submissionEntities = array_reverse($submissionEntities);
 
 		$questions = $this->questionMapper->findByForm($form->getId());
-		$defaultTimeZone = date_default_timezone_get();
+		$defaultTimeZone = $this->timezoneService->getDefaultTimezone();
 
 		if (!$this->currentUser) {
 			$userTimezone = $this->config->getUserValue($form->getOwnerId(), 'core', 'timezone', $defaultTimeZone);