[xigoi]

> It probably should message YOU rather than the person who's birthday it is, so you can send something personal.

We already have that. It’s called a calendar app.

[trallnag]

In Germany Google stopped syncing contacts with the calendar due to data privacy concerns...

[xigoi]

That seems to be only a Google thing and they haven’t mentioned which law they think is forcing them to do this, co just using different contact/calendar apps should do the trick.