public List<ValidateException> validateMonth(int monthOfBirth) {
        List<ValidateException> validateExceptionList = new LinkedList<>();

        if ((monthOfBirth < 1) || (monthOfBirth > 12)) {
            String exMsg = "entered wrong month of birth";
            validateExceptionList.add(new ValidateException(String.format("You %s!", exMsg)));
            logger.warn("User {} - {}.", exMsg, monthOfBirth);
        }
        return validateExceptionList;
    }