I have slightly modified the list of actions to be reported in site history to include the list of "daily connexions".

This requires adding a line in course/report/lig/lib.php in the action array definition :

// Prepare the list of action options.
$actions = array(
'login'=>get_string('login'), <--- add this line
'view' => get_string('view'),
'add' => get_string('add'),
'update' => get_string('update'),
'delete' => get_string('delete'),
'-view' => get_string('allchanges')
);