def months_int(self):
        if not self._is_reversed:
            return list(xrange(self.st_time.month, self.end_time.month + 1))
        else:
            months_st = list(xrange(self.st_time.month, 13))
            months_end = list(xrange(1, self.end_time.month + 1))
            return months_st + months_end