<div dir="ltr">I think you're misinterpreting the data - you've missed the "2019 to max" rule of the second Sunday in April. That "max" part means that it continues until further notice. So basically in any given year (in the range shown), there are two rules active: one transition in April and one in September.<div><br></div><div>I would expect any established IANA database code to handle this with no problems. Here's the set of transitions generated by Noda Time, for America/Santiago between 2015 and 2030 for example: <a href="https://nodatime.org/tzvalidate/generate?version=2022g&zone=America/Santiago&startYear=2015&endYear=2030">https://nodatime.org/tzvalidate/generate?version=2022g&zone=America/Santiago&startYear=2015&endYear=2030</a></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 9 Mar 2023 at 20:23, Jaime Suazo Vacca <<a href="mailto:Jaime.SuazoVacca@cat.com">Jaime.SuazoVacca@cat.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-7141084869264482566">
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<p class="MsoNormal">That is correct we are changing to utc -4 on April second<u></u><u></u></p>
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<p class="MsoNormal">But I don’t see that here. I see the change for 2023 September. Unless Im misinterpreting the tzdata2022g<u></u><u></u></p>
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<p class="MsoNormal">If that is the case I apologize <u></u><u></u></p>
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<p class="MsoNormal"><img width="747" height="84" style="width: 7.7812in; height: 0.875in;" id="m_-7141084869264482566Picture_x0020_1" src="cid:186c80ceb284cff311"><u></u><u></u></p>
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<p class="MsoNormal"><span style="font-family:"Arial Nova Light",sans-serif;color:black">Best regards/Saludos Cordiales,<u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial Nova Light",sans-serif;color:black">Jaime Suazo<u></u><u></u></span></b></p>
<p class="MsoNormal"><span style="font-family:"Arial Nova Light",sans-serif;color:black">Mining Techn. Impl. Spec.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Arial Nova Light",sans-serif;color:black">Caterpillar<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><b>From:</b> Jon Skeet <<a href="mailto:skeet@pobox.com" target="_blank">skeet@pobox.com</a>> <br>
<b>Sent:</b> Thursday, March 9, 2023 4:25 PM<br>
<b>To:</b> Jaime Suazo Vacca <<a href="mailto:Jaime.SuazoVacca@cat.com" target="_blank">Jaime.SuazoVacca@cat.com</a>><br>
<b>Cc:</b> <a href="mailto:tz@iana.org" target="_blank">tz@iana.org</a><br>
<b>Subject:</b> Re: [tz] Questions About tz database<u></u><u></u></p>
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<p class="MsoNormal">Is America/Santiago not the right time zone for you? That has a currently-scheduled change to UTC-4 on April 2nd, according to the latest published version of the database (2022g).<u></u><u></u></p>
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<p class="MsoNormal">Please could you give more information if that's not correct?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Thu, 9 Mar 2023 at 19:14, Jaime Suazo Vacca via tz <<a href="mailto:tz@iana.org" target="_blank">tz@iana.org</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12pt">Hello !!!<u></u><u></u></p>
<p class="MsoNormal">Is this the right place to ask if the latest Chilean tz is going to be added to the database?<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Currently is not there and we have a tz change on April 2023
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<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Thanks for any information you can share with us
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<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"><span style="font-family:"Arial Nova Light",sans-serif;color:black">Best regards/Saludos Cordiales,</span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-family:"Arial Nova Light",sans-serif;color:black">Jaime Suazo</span></b><u></u><u></u></p>
<p class="MsoNormal"><span style="font-family:"Arial Nova Light",sans-serif;color:black">Mining Techn. Impl. Spec.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-family:"Arial Nova Light",sans-serif;color:black">Caterpillar</span><u></u><u></u></p>
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<p style="margin:15pt"><span style="font-size:10pt;color:rgb(115,115,115)">Caterpillar: Confidential Green<u></u><u></u></span></p>
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Caterpillar: Confidential Green<br>
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