def METHOD_NAME(self):
    # See https://docs.djangoproject.com/en/4.0/ref/utils/#django.utils.timezone.now
    # The default for created is an aware datetime in UTC
    # This does that, just manually, with a fixed date
    local_create_date = timezone.datetime(
        2020,
        12,
        25,
        tzinfo=zoneinfo.ZoneInfo("Europe/Berlin"),
    )
    utc_create_date = local_create_date.astimezone(zoneinfo.ZoneInfo("UTC"))
    doc = Document(
        mime_type="application/pdf",
        title="test",
        created=utc_create_date,
    )
    # Ensure the create date would cause an off by 1 if not properly created above
    self.assertEqual(utc_create_date.date().day, 24)
    self.assertEqual(doc.get_public_filename(), "2020-12-25 test.pdf")
    local_create_date = timezone.datetime(
        2020,
        1,
        1,
        tzinfo=zoneinfo.ZoneInfo("Europe/Berlin"),
    )
    utc_create_date = local_create_date.astimezone(zoneinfo.ZoneInfo("UTC"))
    doc = Document(
        mime_type="application/pdf",
        title="test",
        created=utc_create_date,
    )
    # Ensure the create date would cause an off by 1 in the year if not properly created above
    self.assertEqual(utc_create_date.date().year, 2019)
    self.assertEqual(doc.get_public_filename(), "2020-01-01 test.pdf")