My son's Apple ID has his birthday entered, cough accidentally cough, incorrectly, so it appears that he is 28, when he's actually <13 (it was created when <13 accounts weren't possible).
With iCloud Family Sharing, this is problematic. I'd really like to use this, but an adult gets to purchase items without asking permission, so he needs to be a child first.
Attempting to change his birthday in the security settings in desktop Safari gives a "this cannot be changed at this time" error, and attempting to do so in the Settings app in iOS gives a "permission from a parent or guardian is required to create an Apple ID for a child of a young age" error.
Is there any way that I can correct the year of his birth? (It would be nice to not have to create an entirely new Apple ID).