diff --git a/calsocial/__init__.py b/calsocial/__init__.py
index 2468a7a..35b143d 100644
--- a/calsocial/__init__.py
+++ b/calsocial/__init__.py
@@ -76,7 +76,7 @@ class CalendarSocialApp(Flask):
 
     def __init__(self, name, config=None):
         from .models import db, User, Role
-        from .security import security
+        from .security import security, AnonymousUser
 
         Flask.__init__(self, name)
 
@@ -91,7 +91,7 @@ class CalendarSocialApp(Flask):
         babel.localeselector(get_locale)
 
         user_store = SQLAlchemyUserDatastore(db, User, Role)
-        security.init_app(self, datastore=user_store)
+        security.init_app(self, datastore=user_store, anonymous_user=AnonymousUser)
 
         self.context_processor(template_vars)
 
diff --git a/calsocial/security.py b/calsocial/security.py
index 39bd35b..2fcdcbf 100644
--- a/calsocial/security.py
+++ b/calsocial/security.py
@@ -17,6 +17,18 @@
 """Security related things for Calendar.social
 """
 
-from flask_security import Security
+from flask_security import Security, AnonymousUser as BaseAnonymousUser
 
 security = Security()
+
+
+class AnonymousUser(BaseAnonymousUser):
+    """Anonymous user class for Calendar.social
+    """
+
+    @property
+    def timezone(self):
+        """The time zone of the anonymous user
+        """
+
+        return None