[tz] Question about historical TZData for North Carolina

Paul Eggert eggert at cs.ucla.edu
Sun Dec 6 21:49:50 UTC 2015

Clifford Ribaudo wrote:
> I would like to propose that Zone Names be added for each state and which at a minimum simply model the adoption of DST in 1966.

As you know, the U.S. was a huge zoo of local time zone jurisdictions before 
1970, and the same is true elsewhere in the world. The tzdata project considers 
most of this data to be out of scope, as we simply don't have the resources to 
maintain the large, unreliable database that would be needed to cover the world 
before 1970.

That being said, there is a spot for out-of-scope data if you can find good 
sources for it. It's the file 'backzone', and it contains entries such as 
Europe/Guernsey that can be helpful for apps like yours, along with some other 
entries that are dicier. If you can come up with well-sourced data for North 
Carolina and propose a patch for 'backzone', we could slide it in there.  For 
info about doing that, please see:



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