WorldClock.java

import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.stream.Stream;

public class WorldClock {
    public static void main(String[] args) {

        DateTimeFormatter FORMAT = DateTimeFormatter.ofPattern("E, dd MMM u hh:mm:ss a z");

        Stream.of(args)
                .map(ZoneId.SHORT_IDS::get)
                .map(ZoneId::of)
                .map(ZonedDateTime::now)
                .map(time -> time.format(FORMAT))
                .forEach(System.out::println);
    }
}