As was already discussed on your previous request, this type of change is out of scope for our project, so we won't be adding it, sorry.
https://mm.icann.org/pipermail/tz/2021-May/030088.html--
Tim ParentiOn Sat, 11 Sept 2021 at 22:02, Cool Gab19 via tz <tz@iana.org> wrote:I request Etc/GMT-15 or +15 be included in your database