[tz] [PATCH] Revert recent pre-1970 changes.

[Guy Harris]

On Sep 2, 2013, at 12:32 PM, Lester Caine <lester at lsces.co.uk> wrote:

> But this is just a very small part of the use of the tz data, and my main interest is historical times, where we have the location.

"Location" in what sense?  Longitude/latitude?

> All I need to be able to identify is which timezone a location is in on a particular date. THIS is where the shape files defining ISO3166 codes can be useful

If you're talking about using the tzdb, and you have a location in the form of a longitude/latitude, what you want are shape files defining *tzdb zones*, not shape files defining areas labeled with ISO 3166 codes:

	http://efele.net/maps/tz/world/