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Thank you, I have made a docker image which can be pulled from: "docker.io/damon0708/zic:v0.1". The DockerFile is simple:</div>
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FROM alpine
<div>WORKDIR /app/<br>
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<div><span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">RUN apk add tzdata</span><br>
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The image has been installed a tzdata with zic and zoneinfo in /usr/share/zoneinfo, which version is 2021a.<span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">You can pull it to local and run a container from
it by "docker run -ti </span><span style="color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;">damon0708/zic:v0.1 /bin/sh". After running a container, </span></div>
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<div># zic --version</div>
<div>zic (tzcode) 2021a</div>
<div># mkdir tzdata2021a && cd <span style="background-color:rgb(255, 255, 255);display:inline !important">tzdata2021a</span></div>
<div># wget <a href="https://data.iana.org/time-zones/releases/tzdata2021a.tar.gz" id="LPlnk376497">
https://data.iana.org/time-zones/releases/tzdata2021a.tar.gz</a></div>
<div># tar zxf <a href="https://data.iana.org/time-zones/releases/tzdata2021a.tar.gz" style="margin:0px;background-color:rgb(255, 255, 255)">tzdata2021a.tar.gz</a></div>
<div># mkdir ../zoneinfo </div>
<div># zic -d ../zoneinfo/ -L leapseconds africa antarctica asia australasia europe northamerica southamerica etcetera backward factory</div>
<div># cp -f iso3166.tab zone1970.tab zone.tab ../zoneinfo/</div>
<div># diff ../zoneinfo/America/Adak /usr/share/zoneinfo/America/Adak</div>
<div>Files America/Adak and /usr/share/zoneinfo/America/Adak differ<br>
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<div>I ran the same check, still got the result:</div>
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<table align="center" width="720" style="font-size:15px;font-family:"Microsoft Yahei UI", Verdana, Simsun, "Segoe UI", -apple-system, system-ui, Roboto, "Helvetica Neue", sans-serif;color:rgb(32, 31, 30);background-color:white;border-collapse:collapse">
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<td>zone</td>
<td>local time</td>
<td>by 2021a utc time</td>
<td>by 2020d utc time</td>
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<td>America/Adak</td>
<td>2022-11-01 00:00:00</td>
<td>2022-11-01 09:00:00</td>
<td>2022-11-01 10:00:00</td>
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<td>America/Anchorage</td>
<td>2022-11-01 00:00:00</td>
<td>2022-11-01 08:00:00</td>
<td>2022-11-01 09:00:00</td>
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<td>America/Asuncion</td>
<td>2022-10-01 00:00:00</td>
<td>2022-10-01 04:00:00</td>
<td>2022-10-01 03:00:00</td>
<td><br>
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<td>America/Atka</td>
<td>2022-11-01 00:00:00</td>
<td>2022-11-01 09:00:00</td>
<td>2022-11-01 10:00:00</td>
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<div>By the way, I also used the zic(version: @(#)zic.c 8.22) in mac os to generate zoneinfo data, but the check showed no diff in <span style="color:rgb(32, 31, 30);font-family:"Microsoft Yahei UI", Verdana, Simsun, "Segoe UI", -apple-system, system-ui, Roboto, "Helvetica Neue", sans-serif;font-size:15px;background-color:rgb(255, 255, 255);display:inline !important">America/Adak <span style="background-color:rgb(255, 255, 255);display:inline !important">America/Anchorage <span style="background-color:rgb(255, 255, 255);display:inline !important">America/Asuncion <span style="background-color:rgb(255, 255, 255);display:inline !important">America/Atka.</span></span></span></span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>发件人:</b> Paul Eggert <eggert@cs.ucla.edu><br>
<b>发送时间:</b> 2021年3月4日 1:41<br>
<b>收件人:</b> 汪蒙蒙（木之） <wangmm@tuya.com><br>
<b>抄送:</b> Time zone mailing list <tz@iana.org><br>
<b>主题:</b> Re: [tz] zoneinfo generating issues</font>
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<div class="PlainText">On 3/3/21 3:20 AM, 汪蒙蒙（木之） via tz wrote:<br>
> Those zones are not changed from version 2020d to 2021a. I am <br>
> very confused and not sure if I generated the zoneinfo in the right way.<br>
<br>
As Brian wrote, we'd need more info before being able to help much. That <br>
being said, you can check things by comparing your 2020d America/Adak <br>
file to your 2021a America/Adak file. They ought to be identical. If <br>
they're not, it's a problem with how you generated the files. If they <br>
are, it's a problem with the program you wrote.<br>
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