code: public ProjectCalendar addDefaultBaseCalendar()
     {
        ProjectCalendar calendar = add();
  
        calendar.setName(ProjectCalendar.DEFAULT_BASE_CALENDAR_NAME);
  
        calendar.setWorkingDay(Day.SUNDAY, false);
        calendar.setWorkingDay(Day.MONDAY, true);
        calendar.setWorkingDay(Day.TUESDAY, true);
        calendar.setWorkingDay(Day.WEDNESDAY, true);
        calendar.setWorkingDay(Day.THURSDAY, true);
        calendar.setWorkingDay(Day.FRIDAY, true);
        calendar.setWorkingDay(Day.SATURDAY, false);
  
        calendar.addDefaultCalendarHours();
  
        return (calendar);
     }
docs: This is a convenience method used to add a calendar called
  "Standard" to the project, and populate it with a default working week
  and default working hours.
  
  @return a new default calendar