diff --git a/main/inc/lib/auth.lib.php b/main/inc/lib/auth.lib.php
index 3305fd02ab..0d40f0ac5c 100755
--- a/main/inc/lib/auth.lib.php
+++ b/main/inc/lib/auth.lib.php
@@ -473,8 +473,7 @@ class Auth
         while ($row = Database::fetch_array($result)) {
                 $row['registration_code'] = !empty($row['registration_code']);
                 $count_users = count(CourseManager::get_user_list_from_course_code($row['code']));
-                $lastmonth = mktime(0, 0, 0, date("m")-1, date("d"), date("Y"));
-                $count_connections_last_moth = Tracking::get_count_connections_on_the_course($row['code'], 0, $lastmonth);
+                $count_connections_last_month = Tracking::get_course_connections_count($row['code'], 0, api_get_utc_datetime(time()-(30*86400)));
                 $courses[] = array(
                                     'code' => $row['code'],
                                     'directory' => $row['directory'],
@@ -487,7 +486,7 @@ class Auth
                                     'registration_code' => $registration_code,
                                     'creation_date' => $row['creation_date'],
                                     'count_users' => $count_users,
-                                    'count_connections' => $count_connections_last_moth
+                                    'count_connections' => $count_connections_last_month
                                   );
         }
 
@@ -540,8 +539,7 @@ class Auth
 
                 $row['registration_code'] = !empty($row['registration_code']);
                 $count_users = count(CourseManager::get_user_list_from_course_code($row['code']));
-                $lastmonth = mktime(0, 0, 0, date("m")-1, date("d"), date("Y"));
-                $count_connections_last_moth = Tracking::get_count_connections_on_the_course($row['code'], 0, $lastmonth);
+                $count_connections_last_month = Tracking::get_course_connections_count($row['code'], 0, api_get_utc_datetime(time()-(30*86400)));
                 $courses[] = array(
                                     'code' => $row['code'],
                                     'directory' => $row['directory'],
@@ -554,7 +552,7 @@ class Auth
                                     'registration_code' => $registration_code,
                                     'creation_date' => $row['creation_date'],
                                     'count_users' => $count_users,
-                                    'count_connections' => $count_connections_last_moth
+                                    'count_connections' => $count_connections_last_month
                                   );
                    // $courses[] = array('code' => $row['code'], 'directory' => $row['directory'], 'db' => $row['db_name'], 'visual_code' => $row['visual_code'], 'title' => $row['title'], 'tutor' => $row['tutor_name'], 'subscribe' => $row['subscribe'], 'unsubscribe' => $row['unsubscribe']);
             }
diff --git a/main/inc/lib/tracking.lib.php b/main/inc/lib/tracking.lib.php
index 680d036bdb..5e8d8fd199 100755
--- a/main/inc/lib/tracking.lib.php
+++ b/main/inc/lib/tracking.lib.php
@@ -246,20 +246,22 @@ class Tracking {
     }
 
     /**
-     * Get count connections on the course
+     * Get count of the connections to the course during a specified period
      * @param   string  Course code
      * @param   int     Session id (optional)
-     * @param   int     number of month (optional)
+     * @param   int     Datetime from which to collect data (defaults to 0)
+     * @param   int     Datetime to which to collect data (defaults to now)
      * @return  int     count connections
      */
-    public static function get_count_connections_on_the_course($course_code, $session_id = 0, $month = null) {
+    public static function get_course_connections_count($course_code, $session_id = 0, $start = 0, $stop = null) {
 
         // protect data
         $month_filter = '';
-        if (isset($month)) {
-            $month = intval($month);
-            $month_filter = " AND MONTH(login_course_date)= $month ";
+        if ($start < 0) { $start = 0; }
+        if (!isset($stop) or ($stop < 0)) {
+            $stop = api_get_utc_datetime();
         }
+        $month_filter = " AND login_course_date > '$start' AND login_course_date < '$stop' ";
 
         $course_code = Database::escape_string($course_code);
         $session_id  = intval($session_id);
@@ -3836,4 +3838,4 @@ class TrackingUserLogCSV {
     }
     
     
-}
\ No newline at end of file
+}