You do need time zone identifiers or something like that, but they are not something you can blindly buy in. I mean, of course it would be great to see a semi-a

You do need time zone identifiers or something like that, but they are not something you can blindly buy in. I mean, of course it would be great to see a semi-automated solution for that (for example, such a solution can automatically determine Region/Foo is split into Region/Foo and Region/Bar but nothing else)! But the time zone database doesn't provide anything like that, and a built-in support for time zone identifiers can hugely mislead users.