No evidence here that you can get someone's birthday from any state-run DMV
> "Note: Residence address and SSN are confidential except when the requester is authorized by law to receive it."
>Confidential information is not considered public record. This includes certain DMV personnel matters, physical/mental information, residence address, social security number (SSN), incomplete findings from research, results of ongoing investigations, operation plans, and electronic data security controls.
DOB is listed on ID and not considered confidential information.
Nowhere does it say that. If you think they mean that by omission, I highly doubt it.
You cited California DMV which does not give up that information. They won't even give you someone's address unless you're legally entitled, like the police.