"No, I don't. I was never around Wade back home when I had my powers. And I haven't touched him. I don't want his knowledge. So I have no clue when his birthday is."

Because of course David could get birthdays from his ability. People could rattle their own off by rote usually. Especially by their twenties from paperwork alone.

"I could tell you Jean-Paul's, but that's about it for people here. Oh, and that Anders has a world with a different calendar so equivalency might not be possible."

Yeah, some friend he was, not figuring out birthdays.