import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
	public static void main(String[] args) {
		String strDateTime = "2021-09-17 11:48:06 UTC";

		DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd HH:mm:ss VV", Locale.ENGLISH);

		ZonedDateTime zdt = ZonedDateTime.parse(strDateTime, dtf);
		Instant instant = Instant.from(zdt);
		LocalDateTime ldt = zdt.toLocalDateTime();

		System.out.println(zdt);
		System.out.println(instant);
		System.out.println(ldt);
	}
}