diff --git a/js/kronolith.js b/js/kronolith.js
index 7863ef77..879a5c25 100644
--- a/js/kronolith.js
+++ b/js/kronolith.js
@@ -3853,8 +3853,21 @@ KronolithCore = {
             data.owner_input = null;
         }
         if (data.type == 'holiday') {
-            this.insertCalendarInList('holiday', data.driver, Kronolith.conf.calendars.holiday[data.driver]);
-            this.toggleCalendar('holiday', data.driver);
+
+			// getting the holidays that are listed but unselected
+            let check = this.getCalendarList(data.type);          
+            let checklist = check.select('span.horde-resource-off').map(
+                item => item = item.textContent
+            );
+            
+            // checking if the new calendar is in the unselected list
+            if (checklist.indexOf(data.driver) > -1){
+                this.toggleCalendar('holiday', data.driver);
+            }else{
+                this.insertCalendarInList('holiday', data.driver, Kronolith.conf.calendars.holiday[data.driver]);
+                this.toggleCalendar('holiday', data.driver);
+            }
+
             form.down('.kronolithCalendarSave').enable();
             this.closeRedBox();
             this.go(this.lastLocation);