diff --git a/www/common/outer/calendar.js b/www/common/outer/calendar.js
index 9d399f310..cafa028f1 100644
--- a/www/common/outer/calendar.js
+++ b/www/common/outer/calendar.js
@@ -704,8 +704,8 @@ define([
             data.startDay = startDate.getFullYear() + '-' + (startDate.getMonth()+1) + '-' + startDate.getDate();
             data.endDay = endDate.getFullYear() + '-' + (endDate.getMonth()+1) + '-' + endDate.getDate();
         } else {
-            delete ev.startDay;
-            delete ev.endDay;
+            delete data.startDay;
+            delete data.endDay;
         }
 
         c.proxy.content = c.proxy.content || {};