diff --git a/django/models/auth.py b/django/models/auth.py
index 3f82f7e82f..14974c97d4 100644
--- a/django/models/auth.py
+++ b/django/models/auth.py
@@ -2,6 +2,7 @@ from django.core import validators
 from django.db import models
 from django.models import core
 from django.utils.translation import gettext_lazy as _
+import datetime
 
 SESSION_KEY = '_auth_user_id'