@Override
    public boolean isReadonlyInput() {
        return (boolean) getStateHelper().eval(UICalendar.PropertyKeys.readonlyInput,
                () -> "week".equals(getView()) ? true : false);
    }
Standard 576px considered a small screen so we can auto switch the picker to touch mode
primefaces/src/main/java/org/primefaces/component/datepicker/DatePickerBase.java