The systemd project merged a pull request adding a new birthDate field to the JSON user records managed by userdb, in response to age verification laws in California, Colorado, and Brazil.
Lennart Poettering clarified that this is an optional field in the userdb JSON object — not a policy engine, not an API for apps. It just defines the field so it’s standardized if people want to store the date there, but it’s entirely optional. Systemd itself does nothing with the data.
Out of the loop:
What a nothing burger