import java.time.LocalDate;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class Main {
	public static void main(String[] args) {
		ZoneId zoneId = ZoneId.of("Europe/Dublin");
		ZonedDateTime zdtSummerIST = LocalDate.of(2021, 6, 15).atStartOfDay(zoneId);
		ZonedDateTime zdtWinterIST = LocalDate.of(2021, 11, 15).atStartOfDay(zoneId);
		System.out.println(zdtSummerIST);
		System.out.println(zdtWinterIST);
	}
}