[tz] tzdb timezone names/identifiers and links

[Guy Harris]

On Feb 28, 2019, at 2:29 AM, Martin Burnicki <martin.burnicki at meinberg.de> wrote:

> It depends on what is used to determine the time zone automatically, a
> geolocation which can be ambiguous if you are close to some border, or
> e.g. the telecommunication network used by your handheld.
> 
> Even the latter can be wrong.
> 
> For example, I've visited the Canary Islands located in the Atlantic, in
> zone UTC+0, but these islands belong to Spain which is located in the
> zone UTC+1, so my handheld selected UTC+1 automatically, and I had to
> correct it manually to UTC+0 to have the real local time.

Deborah?  Any idea what macOS/iOS/watchOS do in this case?  (And does tvOS do geolocation, presumably via Wi-Fi and services such as Skyhook?)