How do I change my year of birth on my Apple ID?

On your iPhone, iPad, or iPod touch

1. Go to Settings > [your name].
2. Tap Name, Phone Numbers, Email. You might need to enter your Apple ID password.
3. Tap Change Birthday or Birthday.
4. Update your birth date, then tap Done. If you're changing a birth date for a child, learn what to do.

Update the birth date associated with your Apple ID - Apple ...

reianne12 Said:

"how do I change my year of birth on my Apple ID?"

-------

Modifying the Birthday:

Do so using a computer, as it would be more user-friendly doing so.