diff --git a/django/utils/log.py b/django/utils/log.py
index 717c15814c..3d3e8701c7 100644
--- a/django/utils/log.py
+++ b/django/utils/log.py
@@ -160,6 +160,8 @@ class RequireDebugTrue(logging.Filter):
 
 
 class ServerFormatter(logging.Formatter):
+    default_time_format = '%d/%b/%Y %H:%M:%S'
+
     def __init__(self, *args, **kwargs):
         self.style = color_style()
         super().__init__(*args, **kwargs)
diff --git a/tests/logging_tests/tests.py b/tests/logging_tests/tests.py
index 1967ca3687..c2e26d5102 100644
--- a/tests/logging_tests/tests.py
+++ b/tests/logging_tests/tests.py
@@ -605,4 +605,4 @@ class LogFormattersTests(SimpleTestCase):
 
         with patch_django_server_logger() as logger_output:
             logger.info(log_msg)
-            self.assertRegex(logger_output.getvalue(), r'^\[[-:,.\s\d]+\] %s' % log_msg)
+            self.assertRegex(logger_output.getvalue(), r'^\[[/:,\w\s\d]+\] %s\n' % log_msg)