I'm sorry, there is no such page as event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/event_calendar.
No other page links to event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/event_calendar yet.
Notice: 'event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/event_calendar/group/141/2013-12-1/month/event_calendar/group/141/2013-12-1/event_calendar': Bad page name: too long