Red Hat Bugzilla – Bug 244165
invalid timezones Etc/GMT-13, Etc/GMT-14
Last modified: 2015-05-04 21:33:14 EDT
Description of problem:
there is no timezone GMT-13, GMT-14, officially there are 25 timezones:
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. run system-config-date
2. choose teb "Time zone"
3. expand "Non geographic timezones"
There are Etc/GMT-13 and Etc/GMT-14 timezones.
There should be timezones up to GMT+/-12 only.
This affect Anaconda because it uses system-config-date to allow time zone
settings before installation.
system-config-date uses all the timezones found beneath /usr/share/zoneinfo,
e.g. the "Etc/GMT-13" timezone corresponds with the file
/usr/share/zoneinfo/Etc/GMT-13 which is contained in the tzdata package ->
$ rpm -q tzdata
GMT time zones used to be the only alternative for countries that were not
covered by the zoneinfo "proper" zones. By now, most of the inhabited world is
covered by proper zones, but GMT zones remain for backwards compatibility, and
for nautical use.
The -13 and -14 zones in particular were used for countries that are on the edge
of the international date line, so that they are don't end up having different
dates on east and west coast. They have no nautical use, because, as you said,
only -12..+12 makes sense in general; so I guess they are only present for
As there is not official timezone GMT-13/14 how do these countries solve the
issue. IMO they stick to some of the official zones. I think this is problem is
in the competency of those who define timezones. As software dewelopers we
don't have to solve the problems but stick to the rules.