diff --git a/apps/calendar/style/week_view.css b/apps/calendar/style/week_view.css
index b5c3b24777d2..408e96903056 100644
--- a/apps/calendar/style/week_view.css
+++ b/apps/calendar/style/week_view.css
@@ -115,6 +115,7 @@
 #week-view .week-events > ol li.event {
   position: absolute;
   width: 100%;
+  z-index: 10;
 }
 
 #week-view .week-events > ol.hour-allday li.event {