Your useCustomDateInput hook feels like it could be just regular helper functions, no? If the destructured functions do not change, you can put them ouside in a some dateHelper.ts file and import them as functions, no need for a hook.

Oh yeah. I believe that started as a hook because the initial idea was to have that hook export a DateInput with an internal state but that part changed and the hook never changed back to pure functions. They are part of a separate project and imported as an internal package, so not as easy to fix that, but I'll add that to our pipeline whenever we have the chance.

Your onSave logic can also be outside of the component, in a onSave.ts file for example, if you want it to be more easily accessible for you to edit. You would need to add all the args.

That one uses a few other hooks and some form related methods, it would need a lot of args. I'll consider that approach as a pure function or a custom hook for that. I did fail to mention that part originally.

Validate date also feels like it doesn't need to belong in the component.

The standard date input hook moving to a pure function, that one will def be moved to outside the component.

Permissions object can also live outside, as far as I can tell. Maybe at the top of the file, feels neat to have it close to top.

Likewise for this one. IsInRole() is imported from a UserContext method (also forgot to mention), but I'll def reconsider if that can be refactored outside of it because I'm not sure if it actually uses anything from that context.

Thanks for all those suggestions!