On Oct 7, 2021, at 10:00 AM, Tom Lane via tz <tz@iana.org> wrote:
BTW, that brings a thought to mind: why isn't there an easy way to identify the release version of an installed tzdata tree?
I'm envisioning that there could be a text file at the top level, say /usr/share/zoneinfo/version in typical layouts, containing "2021a" or the appropriate string. This'd make it a lot easier to diagnose what you've got in a particular installation.
$ cat /usr/share/zoneinfo/+VERSION 2021a OK, so what is that UN*X? $ uname -sr Darwin 20.6.0 So what does that mean? $ sw_vers ProductName: macOS ProductVersion: 11.6 BuildVersion: 20G165 Your mileage will vary on other UN*Xes; I think +VERSION may be an Appleism (Deborah?), and I don't know when it was first provided.