private boolean checkDays() {
    boolean thereIsAtLeastOneDaySelected = false;
    for (int i = 0; i < weekDays.length && !thereIsAtLeastOneDaySelected; i++) {
      if (weekDays[i]) {
        verticalStepperForm.setStepAsCompleted(DAYS_STEP_NUM);
        thereIsAtLeastOneDaySelected = true;
      }
    }
    if (!thereIsAtLeastOneDaySelected) {
      verticalStepperForm.setStepAsUncompleted(DAYS_STEP_NUM);
    }

    return thereIsAtLeastOneDaySelected;
  }