Not sure where the old reference to an "other" timezone came from.
Going to use the POSIX style esp. after finding the answer below.
Thankfully both options appear in macOS 10.11-10.15 in my testing.
https://stackoverflow.com/a/4309852
This was not being pushed from a testing MacBook so I'm adding it all
at once. This is unfinished, still needs scripts to prep the working
macOS env from which the live env is built.
El Capitan code is likely to be dropped completely. Installing or
compiling dependencies in brew is problematic at this point.
