Timezone appears to be changed after tzdata update.

Issue

After applying last tzdata update in our RHEL 6 servers the timezone appears now as "-03" instead of "BRT":

$ zdump -v /usr/share/zoneinfo/Brazil/East|grep 2018
zdump: warning: zone "/usr/share/zoneinfo/Brazil/East" abbreviation "-03" lacks alphabetic at start
/usr/share/zoneinfo/Brazil/East  Sun Feb 18 01:59:59 2018 UTC = Sat Feb 17 23:59:59 2018 -02 isdst=1 gmtoff=-7200
/usr/share/zoneinfo/Brazil/East  Sun Feb 18 02:00:00 2018 UTC = Sat Feb 17 23:00:00 2018 -03 isdst=0 gmtoff=-10800
/usr/share/zoneinfo/Brazil/East  Sun Nov  4 02:59:59 2018 UTC = Sat Nov  3 23:59:59 2018 -03 isdst=0 gmtoff=-10800
/usr/share/zoneinfo/Brazil/East  Sun Nov  4 03:00:00 2018 UTC = Sun Nov  4 01:00:00 2018 -02 isdst=1 gmtoff=-7200