[tz] Pre-1970 data

Brian Park brian at xparks.net
Fri Nov 5 23:31:54 UTC 2021

On Fri, Nov 5, 2021 at 3:35 PM dpatte <dpatte at relativedata.com> wrote:

> I was be contributing a longer message on this whole subject within a few
> days, but I want to state upfront that country/city is insufficient in many
> countries for a fully expandable location database.
> [...]
> Canada/British_Columbia/Richmond would be more appropriate.

I think you have a different version of an ISO-country-based timezone
database than I had in mind. I was not thinking of a "location database". I
think that would be far too difficult. I was trying to see if we can
capture the hierarchy of timezones, as created by governing authorities,
starting with ISO countries at the root. So
"Canada/British_Columbia/Richmond" would exist only if it followed a
different set of rules than "Canada/Pacific" (and "Canada/Pacific" would be
a Link to "America/Vancouver"). The process of splitting timezones would be
similar to the one used in the current TZDB project, because the entries in
'countryzones' would simply be Links to the canonical TZDB Zone entries.

But as I mentioned in my previous post, I think the scope of this
'countryzone' file is so large, it needs to be a separate project.

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