import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Main {
	public static void main(String[] args) {
		var dateString = "2021-05-12T12:12:12.121Z";
		var odt = OffsetDateTime.parse(dateString);
		var dtf = DateTimeFormatter.ofPattern("MMM dd, uuuu", Locale.ENGLISH);
		System.out.println(dtf.format(odt));
	}
}