gistfile1.txt

// View

      calendar: Ljm.CalendarView.design({
        ...
        selectionBinding: 'Ljm.calendarController.selectedDate'
        ...
      })

// calendarController

Ljm.calendarController = SC.ObjectController.create({

selectedDate: null, 
...

// readingController

require('controllers/calendar');

Ljm.chaptersController = SC.ObjectController.create({

  dateBinding: SC.Binding.oneWay('Ljm.calendarController.selectedDate')
  
   ...