public void incrementYear(int count) {
        WebElement yearInput = showPanel().findElement(By.cssSelector("input.ui-datepicker-year"));
        for (int i = 0; i <  count; i++) {
            yearInput.sendKeys(Keys.ARROW_UP);
        }
    }
Increment the years by count.

@param count the number of years to increment
primefaces-selenium/primefaces-selenium-components/src/main/java/org/primefaces/selenium/component/DatePicker.java