diff --git a/htdocs/comm/action/list.php b/htdocs/comm/action/list.php
index b1b1de6d955..7ece3fdcb28 100644
--- a/htdocs/comm/action/list.php
+++ b/htdocs/comm/action/list.php
@@ -4,7 +4,7 @@
  * Copyright (C) 2004-2016 Laurent Destailleur  <eldy@users.sourceforge.net>
  * Copyright (C) 2005-2012 Regis Houssin        <regis.houssin@inodbox.com>
  * Copyright (C) 2017      Open-DSI             <support@open-dsi.fr>
- * Copyright (C) 2018       Frédéric France         <frederic.france@netlogic.fr>
+ * Copyright (C) 2018-2021  Frédéric France         <frederic.france@netlogic.fr>
  * Copyright (C) 2020		Tobias Sekan		<tobias.sekan@startmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -629,14 +629,17 @@ print $nav;
 $s = $newtitle;
 
 // Calendars from hooks
-$parameters = array(); $object = null;
+$parameters = array();
+$object = null;
 $reshook = $hookmanager->executeHooks('addCalendarChoice', $parameters, $object, $action);
 if (empty($reshook)) {
 	$s .= $hookmanager->resPrint;
 } elseif ($reshook > 1) {
 	$s = $hookmanager->resPrint;
 }
-
+$viewyear = is_object($object) ? dol_print_date($object->datep, '%Y') : '';
+$viewmonth = is_object($object) ? dol_print_date($object->datep, '%m') : '';
+$viewday = is_object($object) ? dol_print_date($object->datep, '%d') : '';
 $viewmode = '';
 $viewmode .= '<a class="btnTitle btnTitleSelected reposition" href="'.DOL_URL_ROOT.'/comm/action/list.php?action=show_list&restore_lastsearch_values=1'.$paramnoactionodate.'">';
 //$viewmode .= '<span class="fa paddingleft imgforviewmode valignmiddle btnTitle-icon">';
@@ -644,25 +647,25 @@ $viewmode .= img_picto($langs->trans("List"), 'object_list', 'class="imgforviewm
 //$viewmode .= '</span>';
 $viewmode .= '<span class="valignmiddle text-plus-circle btnTitle-label hideonsmartphone">'.$langs->trans("ViewList").'</span></a>';
 
-$viewmode .= '<a class="btnTitle reposition" href="'.DOL_URL_ROOT.'/comm/action/index.php?action=show_month&year='.dol_print_date($object->datep, '%Y').'&month='.dol_print_date($object->datep, '%m').'&day='.dol_print_date($object->datep, '%d').$paramnoactionodate.'">';
+$viewmode .= '<a class="btnTitle reposition" href="'.DOL_URL_ROOT.'/comm/action/index.php?action=show_month&year='.$viewyear.'&month='.$viewmonth.'&day='.$viewday.$paramnoactionodate.'">';
 //$viewmode .= '<span class="fa paddingleft imgforviewmode valignmiddle btnTitle-icon">';
 $viewmode .= img_picto($langs->trans("ViewCal"), 'object_calendarmonth', 'class="pictoactionview block"');
 //$viewmode .= '</span>';
 $viewmode .= '<span class="valignmiddle text-plus-circle btnTitle-label hideonsmartphone">'.$langs->trans("ViewCal").'</span></a>';
 
-$viewmode .= '<a class="btnTitle reposition" href="'.DOL_URL_ROOT.'/comm/action/index.php?action=show_week&year='.dol_print_date($object->datep, '%Y').'&month='.dol_print_date($object->datep, '%m').'&day='.dol_print_date($object->datep, '%d').$paramnoactionodate.'">';
+$viewmode .= '<a class="btnTitle reposition" href="'.DOL_URL_ROOT.'/comm/action/index.php?action=show_week&year='.$viewyear.'&month='.$viewmonth.'&day='.$viewday.$paramnoactionodate.'">';
 //$viewmode .= '<span class="fa paddingleft imgforviewmode valignmiddle btnTitle-icon">';
 $viewmode .= img_picto($langs->trans("ViewWeek"), 'object_calendarweek', 'class="pictoactionview block"');
 //$viewmode .= '</span>';
 $viewmode .= '<span class="valignmiddle text-plus-circle btnTitle-label hideonsmartphone">'.$langs->trans("ViewWeek").'</span></a>';
 
-$viewmode .= '<a class="btnTitle reposition" href="'.DOL_URL_ROOT.'/comm/action/index.php?action=show_day&year='.dol_print_date($object->datep, '%Y').'&month='.dol_print_date($object->datep, '%m').'&day='.dol_print_date($object->datep, '%d').$paramnoactionodate.'">';
+$viewmode .= '<a class="btnTitle reposition" href="'.DOL_URL_ROOT.'/comm/action/index.php?action=show_day&year='.$viewyear.'&month='.$viewmonth.'&day='.$viewday.$paramnoactionodate.'">';
 //$viewmode .= '<span class="fa paddingleft imgforviewmode valignmiddle btnTitle-icon">';
 $viewmode .= img_picto($langs->trans("ViewDay"), 'object_calendarday', 'class="pictoactionview block"');
 //$viewmode .= '</span>';
 $viewmode .= '<span class="valignmiddle text-plus-circle btnTitle-label hideonsmartphone">'.$langs->trans("ViewDay").'</span></a>';
 
-$viewmode .= '<a class="btnTitle reposition marginrightonly" href="'.DOL_URL_ROOT.'/comm/action/peruser.php?action=show_peruser&year='.dol_print_date($object->datep, '%Y').'&month='.dol_print_date($object->datep, '%m').'&day='.dol_print_date($object->datep, '%d').$paramnoactionodate.'">';
+$viewmode .= '<a class="btnTitle reposition marginrightonly" href="'.DOL_URL_ROOT.'/comm/action/peruser.php?action=show_peruser&year='.$viewyear.'&month='.$viewmonth.'&day='.$viewday.$paramnoactionodate.'">';
 //$viewmode .= '<span class="fa paddingleft imgforviewmode valignmiddle btnTitle-icon">';
 $viewmode .= img_picto($langs->trans("ViewPerUser"), 'object_calendarperuser', 'class="pictoactionview block"');
 //$viewmode .= '</span>';
@@ -671,7 +674,8 @@ $viewmode .= '<span class="valignmiddle text-plus-circle btnTitle-label hideonsm
 $viewmode .= '<span class="marginrightonly"></span>';
 
 // Add more views from hooks
-$parameters = array(); $object = null;
+$parameters = array();
+$object = null;
 $reshook = $hookmanager->executeHooks('addCalendarView', $parameters, $object, $action);
 if (empty($reshook)) {
 	$viewmode .= $hookmanager->resPrint;