Unparseable date: "2013-07-11T13:41:22.000Z" (at offset 23)

Unparseable date: "2013-07-11T13:41:22.000Z" (at offset 23)

Can anybody tell me why in the world I got this exception?
08-28 08:47:05.246: D/DateParser(4238): String received for parsing is
2013-08-05T12:13:49.000Z
private final static String DATE_FORMAT_PATTERN =
"yyyy-MM-dd'T'HH:mm:ss.SSSZ";
public static Date parseDate(String stringToParse) {
Date date = null;
try {
date = new
SimpleDateFormat(DATE_FORMAT_PATTERN).parse(stringToParse);
} catch (ParseException e) {
Logger.logError(TAG, e);
}
return null;
}
08-28 08:47:05.246: E/DateParser(4238): Exception:
java.text.ParseException: Unparseable date: "2013-08-05T12:13:49.000Z" (at
offset 23)