def day_to_row(month_day)
        starting_wday = @day_start.wday - 1
        starting_wday = 6 if starting_wday < 0

        base = month_day + starting_wday - 1

        #raiser "[#{i},#{j}] => #{base - starting_wday + 1}"


        #days_per_week = number_of_days_per_week

        [base / 7, base % 7]
      end
def day_to_row(month_day)
        starting_wday = @day_start.wday - 1
        starting_wday = 6 if starting_wday < 0

        base = month_day + starting_wday - 1

        #raiser "[#{i},#{j}] => #{base - starting_wday + 1}"


        #days_per_week = number_of_days_per_week

        [base / 7, base % 7]
      end
Get the row and column corresponding to a month's day.
 Response format: [i, j]