Cody Zeller's mom doesn't know when his birthday is

Cody Zeller is one of three brothers who have played in the NBA, so maybe we shouldn't be too hard on his mother for potentially mixing things up.

That's a photo Zeller posted of what appears to be an email from his mother getting the date of his birthday wrong, although technically, wouldn't she be the best source on this matter to go to for the correct information?