On behalf of Microsoft, please refer to the following blog post with details related to Chile's time zone change. https://blogs.technet.microsoft.com/dst2007/2016/03/23/time-zone-update-for-... Regards, Matt Johnson Microsoft Corp. From: tz-bounces@iana.org [mailto:tz-bounces@iana.org] On Behalf Of Ángel González Sent: Friday, April 1, 2016 4:48 PM To: Bustos Alvarez, Cristian <cristian.bustos@sonda.com> Cc: tz@iana.org Subject: Re: [tz] New tzdata 'America/Santiago' 2016 El 31/03/16 22:59, Bustos Alvarez, Cristian escribió: Hi, I want know if you have update the new timezone 2016 for Chile, because to 3 weeks ago the chilean goberment has decided change from GMT -03:00 to -04:00 in May 14. We need create a patche for Red Hat Enterprise Linux 4. Yes, it was updated. You need to ensure you have the data of the latest tz version (2016c). Red Hat *should* provide that update to their customers. Albeit I don't know their timelines for doing so... In adittion, we want know if you create time zone database for Windows. No. Microsoft deals with timezones independently.