private static char[] zeros(int len) {
    char[] array = new char[len];
    for (int i = 0; i < len; i++) {
      array[i] = '0';
    }
    return array;
  }
Generates timestamps for different timezone. Here we are testing UTC+14 : Pacific/Kiritimati ,
 UTC-12 : Etc/GMT+12 along with few other zones
ql/src/test/org/apache/hadoop/hive/ql/io/parquet/serde/TestParquetTimestampsHive2Compatibility.java