diff --git a/htdocs/comm/action/index.php b/htdocs/comm/action/index.php
index 913b46a852b..fe7b15c66fe 100644
--- a/htdocs/comm/action/index.php
+++ b/htdocs/comm/action/index.php
@@ -305,28 +305,28 @@ $param.="&maxprint=".$maxprint;
 // Show navigation bar
 if (empty($action) || $action=='show_month')
 {
-    $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month.$param."\">".img_previous($langs->trans("Previous"))."</a>\n";
+    $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month.$param."\">".img_previous($langs->trans("Previous"), 'class="valignbottom"')."</a>\n";
     $nav.=" <span id=\"month_name\">".dol_print_date(dol_mktime(0,0,0,$month,1,$year),"%b %Y");
     $nav.=" </span>\n";
-    $nav.="<a href=\"?year=".$next_year."&amp;month=".$next_month.$param."\">".img_next($langs->trans("Next"))."</a>\n";
+    $nav.="<a href=\"?year=".$next_year."&amp;month=".$next_month.$param."\">".img_next($langs->trans("Next"), 'class="valignbottom"')."</a>\n";
     $nav.=" &nbsp; (<a href=\"?year=".$nowyear."&amp;month=".$nowmonth.$param."\">".$langs->trans("Today")."</a>)";
     $picto='calendar';
 }
 if ($action=='show_week')
 {
-    $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month."&amp;day=".$prev_day.$param."\">".img_previous($langs->trans("Previous"))."</a>\n";
+    $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month."&amp;day=".$prev_day.$param."\">".img_previous($langs->trans("Previous"), 'class="valignbottom"')."</a>\n";
     $nav.=" <span id=\"month_name\">".dol_print_date(dol_mktime(0,0,0,$first_month,$first_day,$first_year),"%Y").", ".$langs->trans("Week")." ".$week;
     $nav.=" </span>\n";
-    $nav.="<a href=\"?year=".$next_year."&amp;month=".$next_month."&amp;day=".$next_day.$param."\">".img_next($langs->trans("Next"))."</a>\n";
+    $nav.="<a href=\"?year=".$next_year."&amp;month=".$next_month."&amp;day=".$next_day.$param."\">".img_next($langs->trans("Next"), 'class="valignbottom"')."</a>\n";
     $nav.=" &nbsp; (<a href=\"?year=".$nowyear."&amp;month=".$nowmonth."&amp;day=".$nowday.$param."\">".$langs->trans("Today")."</a>)";
     $picto='calendarweek';
 }
 if ($action=='show_day')
 {
-    $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month."&amp;day=".$prev_day.$param."\">".img_previous($langs->trans("Previous"))."</a>\n";
+    $nav ="<a href=\"?year=".$prev_year."&amp;month=".$prev_month."&amp;day=".$prev_day.$param."\">".img_previous($langs->trans("Previous"), 'class="valignbottom"')."</a>\n";
     $nav.=" <span id=\"month_name\">".dol_print_date(dol_mktime(0,0,0,$month,$day,$year),"daytextshort");
     $nav.=" </span>\n";
-    $nav.="<a href=\"?year=".$next_year."&amp;month=".$next_month."&amp;day=".$next_day.$param."\">".img_next($langs->trans("Next"))."</a>\n";
+    $nav.="<a href=\"?year=".$next_year."&amp;month=".$next_month."&amp;day=".$next_day.$param."\">".img_next($langs->trans("Next"), 'class="valignbottom"')."</a>\n";
     $nav.=" &nbsp; (<a href=\"?year=".$nowyear."&amp;month=".$nowmonth."&amp;day=".$nowday.$param."\">".$langs->trans("Today")."</a>)";
     $picto='calendarday';
 }
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 73e42b22b33..1ef841a975a 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -2410,30 +2410,32 @@ function img_error($titlealt = 'default')
  *	Show next logo
  *
  *	@param	string	$titlealt   Text on alt and title of image. Alt only if param notitle is set to 1. If text is "TextA:TextB", use Text A on alt and Text B on title.
- *	@return string      		Return img tag
+*	@param	string	$options	Add more attribute on img tag (For example 'style="float: right"')
+  *	@return string      		Return img tag
  */
-function img_next($titlealt = 'default')
+function img_next($titlealt = 'default', $options='')
 {
 	global $conf, $langs;
 
 	if ($titlealt == 'default') $titlealt = $langs->trans('Next');
 
-	return img_picto($titlealt, 'next.png');
+	return img_picto($titlealt, 'next.png', $options);
 }
 
 /**
  *	Show previous logo
  *
  *	@param	string	$titlealt   Text on alt and title of image. Alt only if param notitle is set to 1. If text is "TextA:TextB", use Text A on alt and Text B on title.
+ *	@param	string	$options	Add more attribute on img tag (For example 'style="float: right"')
  *	@return string      		Return img tag
  */
-function img_previous($titlealt = 'default')
+function img_previous($titlealt = 'default', $options='')
 {
 	global $conf, $langs;
 
 	if ($titlealt == 'default') $titlealt = $langs->trans('Previous');
 
-	return img_picto($titlealt, 'previous.png');
+	return img_picto($titlealt, 'previous.png', $options);
 }
 
 /**
diff --git a/htdocs/theme/eldy/img/next.png b/htdocs/theme/eldy/img/next.png
index a6152079d98..f85bb9154bc 100644
Binary files a/htdocs/theme/eldy/img/next.png and b/htdocs/theme/eldy/img/next.png differ
diff --git a/htdocs/theme/eldy/img/previous.png b/htdocs/theme/eldy/img/previous.png
index 90b9e8f7bad..95934a2b16e 100644
Binary files a/htdocs/theme/eldy/img/previous.png and b/htdocs/theme/eldy/img/previous.png differ
diff --git a/htdocs/theme/eldy/style.css.php b/htdocs/theme/eldy/style.css.php
index b2ca926fd71..14154d01f51 100644
--- a/htdocs/theme/eldy/style.css.php
+++ b/htdocs/theme/eldy/style.css.php
@@ -418,6 +418,9 @@ th .button {
 .valignmiddle {
 	vertical-align: middle;
 }
+.valignbottom {
+	vertical-align: bottom;
+}
 .centpercent {
 	width: 100%;
 }
diff --git a/htdocs/theme/md/img/next.png b/htdocs/theme/md/img/next.png
index a6152079d98..f85bb9154bc 100644
Binary files a/htdocs/theme/md/img/next.png and b/htdocs/theme/md/img/next.png differ
diff --git a/htdocs/theme/md/img/previous.png b/htdocs/theme/md/img/previous.png
index 90b9e8f7bad..95934a2b16e 100644
Binary files a/htdocs/theme/md/img/previous.png and b/htdocs/theme/md/img/previous.png differ
diff --git a/htdocs/theme/md/style.css.php b/htdocs/theme/md/style.css.php
index 9ae58bbb261..fe1e161dfc8 100644
--- a/htdocs/theme/md/style.css.php
+++ b/htdocs/theme/md/style.css.php
@@ -414,6 +414,9 @@ th .button {
 .valignmiddle {
 	vertical-align: middle;
 }
+.valignbottom {
+	vertical-align: bottom;
+}
 .centpercent {
 	width: 100%;
 }