diff -r 9c5b1510919f -r bf573002ff72 calendarui/editors/src/calenunifiededitorcontrol.cpp
--- a/calendarui/editors/src/calenunifiededitorcontrol.cpp	Wed Jun 09 09:40:23 2010 +0300
+++ b/calendarui/editors/src/calenunifiededitorcontrol.cpp	Mon Jun 21 15:38:59 2010 +0300
@@ -676,6 +676,12 @@
     TRACE_ENTRY_POINT;
     
     iAllDayField->SetAllDayEvent( aActive );
+    //set defalut alarmtime when allday field is activated/deactivated
+    if(iUnifiedEditor.EditorFields().IsAlarmActiveInForm())
+        {
+        iUnifiedEditor.EditorDataHandler().SetDefaultAlarmDateTimeL();
+        iReminderField->SetDataToEditorL();
+        }
     
     TRACE_EXIT_POINT
     }