Stuff

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
import java.util.Calendar;
import java.util.GregorianCalendar;
public class Test
{
        public static void main(String[] args) throws Throwable
        {
                SimpleDateFormat df = new SimpleDateFormat("HH:mm zzz");
                GregorianCalendar now = new GregorianCalendar();
                GregorianCalendar then = new GregorianCalendar();
                then.setTime(df.parse(args[0]));
                now.set(Calendar.HOUR_OF_DAY,then.get(Calendar.HOUR_OF_DAY));
                now.set(Calendar.MINUTE,then.get(Calendar.MINUTE));
                df.setTimeZone(TimeZone.getTimeZone("Europe/London"));
                System.out.println(df.format(now.getTime()));
        }
}