diff --git a/rhodecode/model/notification.py b/rhodecode/model/notification.py
--- a/rhodecode/model/notification.py
+++ b/rhodecode/model/notification.py
@@ -32,6 +32,7 @@ import datetime
 from pylons.i18n.translation import _
 
 import rhodecode
+from rhodecode.config.conf import DATETIME_FORMAT
 from rhodecode.lib import helpers as h
 from rhodecode.model import BaseModel
 from rhodecode.model.db import Notification, User, UserNotification
@@ -176,8 +177,6 @@ class NotificationModel(BaseModel):
             notification.TYPE_REGISTRATION: _('registered in RhodeCode')
         }
 
-        DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S"
-
         tmpl = "%(user)s %(action)s %(when)s"
         if show_age:
             when = h.age(notification.created_on)