public List<ValidateException> validateDay(int dayOfBirth) {
        List<ValidateException> validateExceptionList = new LinkedList<>();

        if ((dayOfBirth < 1) || (dayOfBirth > 31)) {
            String exMsg = "entered wrong day of birth";
            validateExceptionList.add(new ValidateException(String.format("You %s!", exMsg)));
            logger.warn("User {} - {}.", exMsg, dayOfBirth);
        }

        return validateExceptionList;
    }