diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 0ec07e1c3fa..90c2a98720f 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -4735,7 +4735,7 @@ class Form
                 // Year
                 if ($emptydate || $set_time == -1)
                 {
-                    $retstring.='<input'.($disabled?' disabled':'').' placeholder="'.dol_escape_htmltag($langs->trans("Year")).'" class="flat maxwidth50imp valignmiddle" type="text" maxlength="4" id="'.$prefix.'year" name="'.$prefix.'year" value="'.$syear.'">';
+                    $retstring.='<input'.($disabled?' disabled':'').' placeholder="'.dol_escape_htmltag($langs->trans("Year")).'" class="flat maxwidth50imp valignmiddle" type="number" min="0" max="3000" maxlength="4" id="'.$prefix.'year" name="'.$prefix.'year" value="'.$syear.'">';
                 }
                 else
                 {
@@ -4918,7 +4918,7 @@ class Form
         }
         elseif ($typehour=='text')
         {
-        	$retstring.='<input placeholder="'.$langs->trans('HourShort').'" type="text" size="1" name="'.$prefix.'hour"'.($disabled?' disabled':'').' class="flat" value="'.($hourSelected?((int) $hourSelected):'').'">';
+        	$retstring.='<input placeholder="'.$langs->trans('HourShort').'" type="number" min="0" size="1" name="'.$prefix.'hour"'.($disabled?' disabled':'').' class="flat" value="'.($hourSelected?((int) $hourSelected):'').'">';
         }
         else return 'BadValueForParameterTypeHour';
 
@@ -4942,7 +4942,7 @@ class Form
         }
         elseif ($typehour=='text')
         {
-        	$retstring.='<input placeholder="'.$langs->trans('MinuteShort').'" type="text" size="1" name="'.$prefix.'min"'.($disabled?' disabled':'').' class="flat" value="'.($minSelected?((int) $minSelected):'').'">';
+        	$retstring.='<input placeholder="'.$langs->trans('MinuteShort').'" type="number" min="0" size="1" name="'.$prefix.'min"'.($disabled?' disabled':'').' class="flat" value="'.($minSelected?((int) $minSelected):'').'">';
         }
         
         if ($typehour!='text') $retstring.=' '.$langs->trans('MinuteShort');