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Wow, that was quick, although I already implemented a Gimatriya code to convert the year from hdate field :D

Regarding changing the API:

On automated systems this is considered a breaking change (if a validation is done on the returned structure, now it has an unexpected new field). I would, at least, control adding this new field via query params and not automatically. (like &fields[]=category&fields[]=hebrew&fields[]=heDateParts, and if fields query param is omitted just return some default fields).

Just my 2 cents.

Thanks, I'm going to look at it and also take a look at the JS package.