If CalendarInfo.EndDayTime property value is less than CalendarInfo.StartDayTime property value, working time will be represented as 2 time intervals - from day start to CalendarInfo.EndDayTime and from CalendarInfo.StartDayTime to day end.
The C1Schedule control honors this setting when ShowWorkTimeOnly property is True. Note, when the ShowWorkTimeOnly property is true, C1Schedule always shows the full hour. As a result, some free time might be included into the view.