docs: function fmtXyzDate(fmtStr, time, offset) {
        var date = dateBase(time);
        if (!date.getTime()) return '';
        var ms = date.getUTCMilliseconds()
          , tm = timestamp(fmtUtcDate('yyyy/MM/dd hh:mm:ss', time)) + ms + (!+offset ? 0 : +offset);
        return fmtDate(fmtStr, tm);
      }