code: public static String format( TimeZone timeZone, Date date ) {
          return format( DateFormat.DATE_FORMAT_STR_ISO8601, timeZone, date );
      }
docs: Format a date using {@link #DATE_FORMAT_STR_ISO8601} and {@link TimeZone} given in parameter
  
  @param timeZone timezone to use
  @param date date to format
  @return the formatted date