diff --git a/django/forms/fields.py b/django/forms/fields.py
index 124e4f669a..0075325288 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -341,7 +341,7 @@ class BaseTemporalField(Field):
             for format in self.input_formats:
                 try:
                     return self.strptime(value, format)
-                except ValueError:
+                except (ValueError, TypeError):
                     continue
         raise ValidationError(self.error_messages['invalid'])
 
diff --git a/tests/regressiontests/forms/tests/fields.py b/tests/regressiontests/forms/tests/fields.py
index 197ce1abd9..989acbc496 100644
--- a/tests/regressiontests/forms/tests/fields.py
+++ b/tests/regressiontests/forms/tests/fields.py
@@ -356,6 +356,11 @@ class FieldsTests(SimpleTestCase):
         self.assertEqual(datetime.date(2006, 10, 25), f.clean(' 25 October 2006 '))
         self.assertRaisesMessage(ValidationError, "'Enter a valid date.'", f.clean, '   ')
 
+    def test_datefield_5(self):
+        # Test null bytes (#18982)
+        f = DateField()
+        self.assertRaisesMessage(ValidationError, "'Enter a valid date.'", f.clean, 'a\x00b')
+
     # TimeField ###################################################################
 
     def test_timefield_1(self):