code: public void setDefaultCalendarName(String calendarName)
     {
        if (calendarName == null || calendarName.length() == 0)
        {
           calendarName = DEFAULT_CALENDAR_NAME;
        }
  
        set(ProjectField.DEFAULT_CALENDAR_NAME, calendarName);
     }
docs: Sets the Calendar used. 'Standard' if no value is set.
  
  @param calendarName Calendar name