On 25 October 2015 at 13:26, Paul G <paul@ganssle.io> wrote:

> I think, as Paul E suggests, keeping the version external is a good choice here. It encourages people to use whatever the platform provides to find out the exact, local version information. If anyone knows how to find out what version of tzdata is installed on this macbook I’d love to know :)

I think this perfectly illustrates the reason why the versioning should be at the zic level and not downstream.

There's also the separate matter that tzcode and tzdata are separate and largely independent. Although there have been a few breaking changes to the data format over the years, in principle, there's little reason someone couldn't use a 2014j zic to compile 2015g data, and I suspect that sort of thing actually happens somewhat often.

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Tim Parenti