Reproduce as follows:
1. Set locale to en_IE on Windows 2000:
  * Windows Control Panel, Regional Options, Your locale -> "English (Ireland)"
2. Set timezone to GMT (Dublin, London)
  * Windows Control Panel, Date/Time -> (Dublin, London, ..)

Sample code:
      DateFormat df = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.FULL);
        String s = df.format(new Date());
        System.out.println("Default timezone is " + TimeZone.getDefault());
        System.out.println("Default date format for locale " + Locale.getDefault() + " is " + s);


Sample output at 21.27 BST is:

Default timezone is sun.util.calendar.ZoneInfo[id="Europe/London",offset=0,dstSavings=3600000,useDaylight=true,
transitions=242,lastRule=java.util.SimpleTimeZone[id=Europe/London,offset=0,dstSavings=3600000,useDaylight=true
,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,
endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]]
Default date format for locale en_IE is 06 June 2003 21:27:55 o'clock IST