I agree with Robert and Mark: adding a new file seems like it adds unnecessary complexity and will invite incompatibility with some clients. Is there any downside (other than the work required to patch it) to putting this ID into `backward`? Would doing so cause a different incompatibility? Thanks, Justin Grant (I'm the "timezone guy" on TC39, the standards committee for JavaScript) On Tue, Jul 1, 2025 at 3:41 PM Mark Davis via tz <tz@iana.org> wrote:
I agree with Robert. All ID's in backzone need to be in some regular file. The simplest and most compatible way to do that is to put it into backward, and then simply add to the documentation that backward also contains some other IDs from backzone.
One could make a separate file 'addzone', but for some period of time implementations will fail to look at that file, leading to continued incompatibilities. So the better choice is just to broaden the scope of 'backward' slightly.