diff --git a/htdocs/holiday/card.php b/htdocs/holiday/card.php
index f6484a313aa..b55c5468a09 100644
--- a/htdocs/holiday/card.php
+++ b/htdocs/holiday/card.php
@@ -1278,9 +1278,13 @@ else
                     print '</td>';
                     print '</tr>';
                 }
+
                 // Nb of days
                 print '<tr>';
-                print '<td>'.$langs->trans('NbUseDaysCP').'</td>';
+                print '<td class="nowrap">';
+                $htmlhelp = $langs->trans('NbUseDaysCPHelp');
+                print $form->textwithpicto($langs->trans('NbUseDaysCP'), $htmlhelp);
+                print '</td>';
                 print '<td>'.num_open_day($object->date_debut_gmt, $object->date_fin_gmt, 0, 1, $object->halfday).'</td>';
                 print '</tr>';
 
diff --git a/htdocs/langs/en_US/holiday.lang b/htdocs/langs/en_US/holiday.lang
index 69b6a698e1a..e30366286fe 100644
--- a/htdocs/langs/en_US/holiday.lang
+++ b/htdocs/langs/en_US/holiday.lang
@@ -39,6 +39,7 @@ TypeOfLeaveId=Type of leave ID
 TypeOfLeaveCode=Type of leave code
 TypeOfLeaveLabel=Type of leave label
 NbUseDaysCP=Number of days of vacation consumed
+NbUseDaysCPHelp=The calculation takes into account the non working days and the holidays defined in the dictionary
 NbUseDaysCPShort=Days consumed
 NbUseDaysCPShortInMonth=Days consumed in month
 DateStartInMonth=Start date in month