def day_of_year(date = self)
      date.month == 1 ? date.day : (DAYS_IN_YEAR[date.month - 2] + date.day)
    end
def day_of_year(date = self)
      date.month == 1 ? date.day : (DAYS_IN_YEAR[date.month - 2] + date.day)
    end
day of the year corresponding to this (or specified) Hijri date