$ fq -d tzif dv GMT-8
    |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.{}: GMT-8 (tzif) 0x0-0x75 (117)
    |                                               |                |  v1header{}: 0x0-0x2c (44)
0x00|54 5a 69 66                                    |TZif            |    magic: 0x545a6966 (valid) 0x0-0x4 (4)
0x00|            32                                 |    2           |    ver: "2" (0x32) (valid) 0x4-0x5 (1)
0x00|               00 00 00 00 00 00 00 00 00 00 00|     ...........|    reserved: raw bits 0x5-0x14 (15)
0x10|00 00 00 00                                    |....            |
0x10|            00 00 00 00                        |    ....        |    isutcnt: 0 0x14-0x18 (4)
0x10|                        00 00 00 00            |        ....    |    isstdcnt: 0 0x18-0x1c (4)
0x10|                                    00 00 00 00|            ....|    leapcnt: 0 0x1c-0x20 (4)
0x20|00 00 00 00                                    |....            |    timecnt: 0 0x20-0x24 (4)
0x20|            00 00 00 01                        |    ....        |    typecnt: 1 0x24-0x28 (4)
0x20|                        00 00 00 04            |        ....    |    charcnt: 4 0x28-0x2c (4)
    |                                               |                |  v1datablock{}: 0x2c-0x36 (10)
    |                                               |                |    transition_times[0:0]: 0x2c-0x2c (0)
    |                                               |                |    transition_types[0:0]: 0x2c-0x2c (0)
    |                                               |                |    local_time_type_records[0:1]: 0x2c-0x32 (6)
    |                                               |                |      [0]{}: local_time_type 0x2c-0x32 (6)
0x20|                                    00 00 70 80|            ..p.|        utoff: 28800 (valid) 0x2c-0x30 (4)
0x30|00                                             |.               |        dst: 0 (valid) 0x30-0x31 (1)
0x30|   00                                          | .              |        idx: 0 (valid) 0x31-0x32 (1)
    |                                               |                |    time_zone_designations[0:1]: 0x32-0x36 (4)
0x30|      2b 30 38 00                              |  +08.          |      [0]: "+08" time_zone_designation 0x32-0x36 (4)
    |                                               |                |    leap_second_records[0:0]: 0x36-0x36 (0)
    |                                               |                |    standard_wall_indicators[0:0]: 0x36-0x36 (0)
    |                                               |                |    ut_local_indicators[0:0]: 0x36-0x36 (0)
    |                                               |                |  v2plusheader{}: 0x36-0x62 (44)
0x30|                  54 5a 69 66                  |      TZif      |    magic: 0x545a6966 (valid) 0x36-0x3a (4)
0x30|                              32               |          2     |    ver: "2" (0x32) (valid) 0x3a-0x3b (1)
0x30|                                 00 00 00 00 00|           .....|    reserved: raw bits 0x3b-0x4a (15)
0x40|00 00 00 00 00 00 00 00 00 00                  |..........      |
0x40|                              00 00 00 00      |          ....  |    isutcnt: 0 0x4a-0x4e (4)
0x40|                                          00 00|              ..|    isstdcnt: 0 0x4e-0x52 (4)
0x50|00 00                                          |..              |
0x50|      00 00 00 00                              |  ....          |    leapcnt: 0 0x52-0x56 (4)
0x50|                  00 00 00 00                  |      ....      |    timecnt: 0 0x56-0x5a (4)
0x50|                              00 00 00 01      |          ....  |    typecnt: 1 0x5a-0x5e (4)
0x50|                                          00 00|              ..|    charcnt: 4 0x5e-0x62 (4)
0x60|00 04                                          |..              |
    |                                               |                |  v2plusdatablock{}: 0x62-0x6c (10)
    |                                               |                |    transition_times[0:0]: 0x62-0x62 (0)
    |                                               |                |    transition_types[0:0]: 0x62-0x62 (0)
    |                                               |                |    local_time_type_records[0:1]: 0x62-0x68 (6)
    |                                               |                |      [0]{}: local_time_type 0x62-0x68 (6)
0x60|      00 00 70 80                              |  ..p.          |        utoff: 28800 (valid) 0x62-0x66 (4)
0x60|                  00                           |      .         |        dst: 0 (valid) 0x66-0x67 (1)
0x60|                     00                        |       .        |        idx: 0 (valid) 0x67-0x68 (1)
    |                                               |                |    time_zone_designations[0:1]: 0x68-0x6c (4)
0x60|                        2b 30 38 00            |        +08.    |      [0]: "+08" time_zone_designation 0x68-0x6c (4)
    |                                               |                |    leap_second_records[0:0]: 0x6c-0x6c (0)
    |                                               |                |    standard_wall_indicators[0:0]: 0x6c-0x6c (0)
    |                                               |                |    ut_local_indicators[0:0]: 0x6c-0x6c (0)
    |                                               |                |  footer{}: 0x6c-0x75 (9)
0x60|                                    0a         |            .   |    nl1: 10 (valid) 0x6c-0x6d (1)
0x60|                                       3c 2b 30|             <+0|    tz_string: "<+08>-8" 0x6d-0x74 (7)
0x70|38 3e 2d 38                                    |8>-8            |
0x70|            0a|                                |    .|          |    nl2: 10 (valid) 0x74-0x75 (1)