How to unlock Apple ID after forgetting birthday

Hi there

Please try this

Step 1: Try Unlocking via a Trusted Device

If you are already signed into an iPhone, iPad, or Mac with that account, you may not need your birthdate to reset your password or unlock it:

1. Open Settings on your Apple device and tap your name at the top.
2. Select Sign-In & Security (or Password & Security).
3. Tap Change Password.
4. Enter your device's lock screen passcode to set a new password and unlock the account. 

Step 2: Use Account Recovery

Go to Apple's iForgot Recovery Page. 

1. Enter your Apple ID email or phone number. 
2. Follow the prompts. If it asks for information you do not know (like your birthday) and you cannot verify your identity through standard recovery keys or trusted phone numbers, you will have to opt to start Account Recovery. 
3. Account recovery can take several days. Apple will text or call your verified phone number once the waiting period finishes with instructions. 

I am not familiar with Apple ever asking for a birthday unless it is an option as part of account recovery.

This Apple article has instructions for what to do if you have forgotten your Apple account password, or the system does not recognize the one you remember —> https://support.apple.com/102656 or go directly to this web reset link —> https://iforgot.apple.com/ (“The reset process on the web might take a little longer. If you’ll have access to one of your trusted devices soon, it might be faster and easier to reset your password at that time.”)

If you find you can’t sign in, reset your password, or receive verification codes, you can request account recovery (read this support article: https://support.apple.com/102656#:~:text=If%20you%20can%27t%20reset%20your%20password%2C%20request%20account%20recovery ) to regain access to your account. Account recovery might take a few days or longer, depending on the specific account information you can provide to verify your identity. This is a multi-step process. More detail in —> https://discussions.apple.com/thread/255401538?answerId=260044580022#260044580022 and https://discussions.apple.com/thread/255733423

This page has telephone numbers for contacting Apple for support and service ➞ https://support.apple.com/106932