> Support for month/day in year fields.
As far as I can see, this is only supported in the advanced tag editor and the information is not stored in the database?!
I was especially looking for support in plugins and scripts.
It's true that it's only supported in the Advanced Tag Editor so far (just like in older Helium versions, but for all file formats), but it is stored in the database as "extra fields" since it's not mandatory.
It is displayed in all track listings and not yet supported in scripts/plugins.