diff --git a/apps/calendar/js/calendar.js b/apps/calendar/js/calendar.js
index f8ab2fe4bd..e17f88e38b 100644
--- a/apps/calendar/js/calendar.js
+++ b/apps/calendar/js/calendar.js
@@ -705,10 +705,12 @@ function ListView(element, calendar) {
 		if (delta) {
 			if (delta < 0){
 				addDays(t.start, -7);
+				addDays(t.end, -7);
 				if (!opt('weekends')) {
 					skipWeekend(t.start, delta < 0 ? -1 : 1);
 				}
 			}else{
+				addDays(t.start, 7);
 				addDays(t.end, 7);
 				if (!opt('weekends')) {
 					skipWeekend(t.end, delta < 0 ? -1 : 1);