I'd suggest that we make the opening and closing times accessible via the API for usage within koha (for example in Vue) as well as usage on external websites (for example an institution's main website separate from the OPAC). We could either add it to the /libraries endpoint's responses or create a dedicated endpoint for opening hours. I'm leaning more towards the inclusion within the library responses.
You can embed them already.
However.. I'd really like to see bug 36079 happen where we actually allow for regular open/closed days to be set with opening hours and thus returned in the same embedded response