I wrote:
> Also, it's worth pointing out here that falling back to Etc/GMT+/-n
> is intended to be just that, a last-ditch fallback that won't be seen
> in normal practice. We still need to do some more work on
> identify_system_timezone() to make that happen outside North America,
> but I would like to think that average users will never see these zones
> except by deliberate selection.
BTW, as of an hour or so ago, identify_system_timezone is a bit smarter
than before. Please try it and see if it gets it right on your machine.
regards, tom lane