On Tue, Aug 16, 2022 at 8:51 PM Paul Eggert <eggert@cs.ucla.edu> wrote:

On 8/16/22 14:57, Bradley White wrote:
> $ TZ=<path-to-standard>/Africa/Freetown date -d @1660625107
> Tue Aug 16 04:45:07 GMT 2022
> $ TZ=<path-to-packrat>/Africa/Freetown date -d @1660625107
> Tue Aug 16 05:05:07 +01 2022

The Africa/Freetown glitch was introduced in 2022a when fixing other
problems with Sierra Leone.

I ran the following test to find similar glitches: [...]

I installed into the development repository the attached patch to
'backzone' to fix these glitches. The above test passes now.

For what it's worth, that patch appears to remove the last instance of "DST all year". Hopefully you have some other hidden tests that continue to exercise those code paths.