diff --git a/templates/custom.config.php.epp b/templates/custom.config.php.epp
index 3fbecfc..2d83b5d 100644
--- a/templates/custom.config.php.epp
+++ b/templates/custom.config.php.epp
@@ -63,4 +63,7 @@ $CONFIG = array (
 
   // silent annoying messages
   'encryption.legacy_format_support' => false,
+
+  // maintenance schedule
+  'maintenance_window_start' => 2, // From 2 AM. to 6 AM. UTC
 );