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.

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: https://nodatime.org/tzvalidate/generate?version=2022g&zone=America/Santiago&startYear=2015&endYear=2030

On Thu, 9 Mar 2023 at 20:23, Jaime Suazo Vacca <Jaime.SuazoVacca@cat.com> wrote:

That is correct we are changing to utc -4 on April second

 

But I don’t see that here. I see the change for 2023 September. Unless Im misinterpreting the tzdata2022g

 

If that is the case I apologize

 

 

 

Best regards/Saludos Cordiales,

Jaime Suazo

Mining Techn. Impl. Spec.

Caterpillar

 

From: Jon Skeet <skeet@pobox.com>
Sent: Thursday, March 9, 2023 4:25 PM
To: Jaime Suazo Vacca <Jaime.SuazoVacca@cat.com>
Cc: tz@iana.org
Subject: Re: [tz] Questions About tz database

 

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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).

 

Please could you give more information if that's not correct?

 

On Thu, 9 Mar 2023 at 19:14, Jaime Suazo Vacca via tz <tz@iana.org> wrote:

Hello !!!

Is this the right place to ask if the latest Chilean tz is going to be added to the database?

 

Currently is not there and we have a tz change on April 2023

 

Thanks for any information you can share with us

 

Best regards/Saludos Cordiales,

Jaime Suazo

Mining Techn. Impl. Spec.

Caterpillar

 

 

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