diff --git a/src/documents/models.py b/src/documents/models.py
index a1a787325..8f531e401 100644
--- a/src/documents/models.py
+++ b/src/documents/models.py
@@ -11,7 +11,6 @@ from django.conf import settings
 from django.contrib.auth.models import User
 from django.db import models
 from django.utils import timezone
-from django.utils.timezone import is_aware
 from django.utils.translation import gettext_lazy as _
 from documents.parsers import get_default_file_extension
 
@@ -210,10 +209,8 @@ class Document(models.Model):
         verbose_name_plural = _("documents")
 
     def __str__(self):
-        if is_aware(self.created):
-            created = timezone.localdate(self.created).isoformat()
-        else:
-            created = datetime.date.isoformat(self.created)
+        created = datetime.date.isoformat(self.created)
+
         if self.correspondent and self.title:
             return f"{created} {self.correspondent} {self.title}"
         else:
diff --git a/src/documents/tests/test_document_model.py b/src/documents/tests/test_document_model.py
index a99d6dd18..41e3d9337 100644
--- a/src/documents/tests/test_document_model.py
+++ b/src/documents/tests/test_document_model.py
@@ -3,6 +3,11 @@ import tempfile
 from pathlib import Path
 from unittest import mock
 
+try:
+    import zoneinfo
+except ImportError:
+    import backports.zoneinfo as zoneinfo
+
 from django.test import override_settings
 from django.test import TestCase
 from django.utils import timezone
@@ -55,6 +60,24 @@ class TestDocument(TestCase):
         )
         self.assertEqual(doc.get_public_filename(), "2020-12-25 test.pdf")
 
+    def test_file_name_with_timezone(self):
+
+        doc = Document(
+            mime_type="application/pdf",
+            title="test",
+            created=timezone.datetime(
+                2020,
+                12,
+                25,
+                0,
+                0,
+                0,
+                0,
+                zoneinfo.ZoneInfo("Europe/Berlin"),
+            ),
+        )
+        self.assertEqual(doc.get_public_filename(), "2020-12-25 test.pdf")
+
     def test_file_name_jpg(self):
 
         doc = Document(