[ntp:questions] Wrong Brazilian time with 2.android.pool.ntp.org (Summertime)

William Unruh unruh at invalid.ca
Wed Nov 18 17:09:41 UTC 2020

This has nothing to do with summer time. ntp delivers UTC. That is it.
It has no idea of what summer time, winter time, time zones are nor does
it care. It delivers UTC time. All of the interpretation of the time
into things like timezones, summer time, etc are done locally by your
computer and your operating system. Many use a set of files called
timezone files (tzdata) to look up what the relation  between time at
your location and UTC is. When politicians decide to change those
relations, (eg by abolishing summer time) new tzdata files are issued
which need to be installed on your system. You do not tell us what your
operating system is etc. Note tht some operating systems leave it up to
you to insititute changes (like your wrist watch which you have to keep
resetting when timezones/summer times/... change)

So your problem has nothing to do with NTP. It is a problem within
the device itself. 

On 2020-11-18, Arthur Jahnke Hoch <arthur.j.h96 at gmail.com> wrote:
> Hello!
> I have many devices with NTP getting a wrong time to Brazil, in Brazil does not exist summertime anymore to (Brasília - Brazil -2), but NTP server  its returning -2 instead of -3.
> NTP servers that I use:
> 2.android.pool.ntp.org
> south-america.pool.ntp.org
> north-america.pool.ntp.org
> pool.ntp.org
> ntp.api.bz
> ntp.nict.jp
> ntp.sjtu.edu.cn
> 0.asia.pool.ntp.org
> 0.pool.ntp.org
> 0.us.pool.ntp.org
> 1.cn.pool.ntp.org
> 1.us.pool.ntp.org
> 2.asia.pool.ntp.org
> 2.us.pool.ntp.org
> asia.pool.ntp.org
> cn.pool.ntp.org
> europe.pool.ntp.org
> south-america.pool.ntp.org
> north-america.pool.ntp.org
> s2m.time.edu.cn
> time.izatcloud.net
> time-a.nist.gov
> What can I do for solve this issue?

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