My (now ex) bank, BofA, which had been with for 20 years, recently insisted I talk to them via the phone, no email, to verify my customer information hadn't changed. One of the important facts they needed to verify hadn't changed was....my date of birth. And yes, I verified that was indeed what they were asking for and the bot I was speaking with was at a complete loss to explain how that might have changed. All they could do is repeat over and over that they had to ask these questions for my safety.
Maybe that was a phishing attempt? Or, asking your date of birth might have been to help ensure it was really you speaking to them.

