The problem

I recently set up the holidays integration for my country (France), and was left puzzled at the second step:

As a Frenchman living in mainland France, I have no idea what those abbreviations mean. The second issue is that It wasn't obvious to me that step was optional.

I've started solving this issue by contributing to the holidays project itself, both to their documentation and to the source code: vacanza/holidays#2162

Now I'd like HA to make use of that subdivisions_aliases when available to present a more user-friendly list of options. The holidays project follows ISO 3166-2, which is great for machines, not so much for humans.

I've pinpointed the code in core, but before spending more time, I'd like to know if you'd be be interested in such a contribution.

On a side note, it's not just France. I've checked other countries have defined plain-text aliases in holidays, like Italy or New Zealand, so it would benefit to users of those countries as well.

What version of Home Assistant Core has the issue?

core-2024.12.4

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

holiday

Link to integration documentation on our website

https://www.home-assistant.io/integrations/holiday

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response