diff --git a/css/fullcalendar.scss b/css/fullcalendar.scss
index ae6461075..a74f1d262 100644
--- a/css/fullcalendar.scss
+++ b/css/fullcalendar.scss
@@ -136,6 +136,7 @@
 
 	&.fc-event-nc-task-completed,
 	&.fc-event-nc-tentative,
+	&.fc-event-past,
 	&.fc-event-nc-cancelled {
 		opacity: .5;
 	}