diff --git a/calendar/templates/default/app.css b/calendar/templates/default/app.css
index ea0bbf00e1..2f4e2f28f7 100644
--- a/calendar/templates/default/app.css
+++ b/calendar/templates/default/app.css
@@ -739,6 +739,7 @@ e.g. the div with class calendar_calTimeGrid is generated by the timeGridWidget
     border-right: 1px dotted;
 	pointer-events: none;
 	z-index: 40;
+	display: none;
 }
 .calendar_plannerWidget .verticalBar > span {
 	position: absolute;