Weather stations miss timezone information
Commit d7682676 moved weather stations from cities to countries.
One (probably unintended) result of that is that for many of those locations, gweather_location_get_timezone()
no longer returns a timezone: The station is unlikely to have an entry of its own, and the country may not have an unambiguous entry.
While not handling the case is clearly a bug in consumers (see gnome-shell#1062 (closed) for an example), it would still be good to find a way to associate a timezone to those locations again to not render them useless for consumers like gnome-clocks.