import java.time.Instant;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoUnit;
import java.util.Date;
import java.util.GregorianCalendar;

public class Main {
	public static void main(String[] args) {
		// A sample java.util.Date
		Date dateObj = GregorianCalendar.from(ZonedDateTime.of(2021, 10, 2, 22, 25, 0, 0, ZoneOffset.UTC)).getTime();

		Instant instant = dateObj.toInstant();

		// Difference between now and the given java.util.Date
		System.out.println(ChronoUnit.DAYS.between(Instant.now(), instant));
	}
}