Comment 1 for bug 886480

https://github.com/tzinfo/tzinfo-data/blob/master/data/europe#L1788

The time zone database is not about official political recognition. It is simply a database of local time. That region announced they were not switching to "winter time" so an urgent change was made to reflect that, but the officials changed their mind so the change was reverted almost immediately:

https://launchpad.net/ubuntu/+source/tzdata/2011n-1