How to automate Date Picker on MakeMyTrip website?

package demopackage;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class CalendarExample {

public static void main(String[] args) throws InterruptedException {
// TODO Auto-generated method stub

System.setProperty("webdriver.chrome.driver", "C:\\Work\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.manage().window().maximize();

driver.get("https://www.makemytrip.com/");

driver.findElement(By.xpath("//span[contains(text(),'DEPARTURE')]")).click();
Thread.sleep(5000);

String flag = "False";


while(flag=="False") {

if(driver.findElements(By.xpath("//div[@class='DayPicker-Day'][contains(@aria-label,'Aug 10 2020')]")).size()>0) {

driver.findElement(By.xpath("//div[@class='DayPicker-Day'][contains(@aria-label,'Aug 10 2020')]")).click();
flag="True";
Thread.sleep(5000);
}

else {
Thread.sleep(5000);
driver.findElement(By.xpath("//span[@class='DayPicker-NavButton DayPicker-NavButton--next']")).click();
}

}


System.out.println("Test case is passed");
driver.close();


}

}