diff --git a/public/stylesheets/calendar.css b/public/stylesheets/calendar.css
index 288ed724f..e6c20f8ea 100644
--- a/public/stylesheets/calendar.css
+++ b/public/stylesheets/calendar.css
@@ -6,7 +6,7 @@ img.calendar-trigger {
     margin-left: 4px;
 }
 
-div.calendar { position: relative; z-index: 30;}
+div.calendar { position: relative; z-index: 60;}
 
 div.calendar, div.calendar table {
   border: 1px solid #556;