CentOS not considering daylight saving on timezone

Solution 1:

Brazil's DST change was included in TZ version 2019b.

Running yum update tzdata should get you the newest version (which is actually 2019c, but it includes the change you care about).

You can use rpm -q tzdata to check the version you have.

CentOS seems to be running behind on making these updates available - they still only offer 2019a. See https://www.centos.org/forums/viewtopic.php?t=72416 for discussion and https://bugs.centos.org/view.php?id=16702 for the bug report

Solution 2:

Brazil no longer observing DST is in tzdata-2019b circa July. (ICANN, formerly IANA, is the maintainer compiling the changes.)

For some reason, I only find 2019a on the CentOS 8 mirrors. Consider raising the issue in a bug report or mailing list. Upstream RHEL commits to a prompt tzdata release.

Until this is updated, consider picking another city at the same offset, like America/Argentina/Buenos_Aires. (Hopefully both do the sane thing and stay on no DST, but who knows...)