private static Stream<Arguments> generateTimestampsAndZoneIds() {
    return generateJulianLeapYearTimestamps().flatMap(
        timestampString -> Stream.of("Asia/Singapore", "Pacific/Kiritimati", "Etc/GMT+12", "Pacific/Niue")
            .map(zoneId -> Arguments.of(timestampString, zoneId)));
  }
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