[tz] What is the "Factory" Zone used for?

<<On Thu, 10 Aug 2023 12:19:15 -0700, Justin Grant via tz <tz@iana.org> said:

There's a Zone called "Factory". What is its purpose, and how is it used?

It is intended for use as a factory default, to clearly indicate an unconfigured system rather than one that is intentionally configured to run on UTC. -GAWollman