At least on my system, running macOS 10.13.6 ("High Sierra"), there's an extra file called +VERSION in the install directory.

$ cat /usr/share/zoneinfo/+VERSION
2019b

I guess it's a bit behind.

--
Tim Parenti

On Fri, 20 Sep 2019 at 14:53, Paul Gilmartin via tz <tz@iana.org> wrote:

Just curious:

On a Linux system logs tell me that zoneinfo was recently
updated to 2019c.  Good.

On a MacOS system the zoneinfo is older than 2019c.  But
which is it?  When I grep through the installed zoneinfo
I find no strings that seem to identify the version.  Is
this information available somehow?

Thanks,
gil