Edit Birthday

Edit Birthday enables you to edit the birthdates of your contacts. The added or edited birthdates will be instantly visible when viewing your contacts and will be synced.

You will need Edit Birthday only on devices that don't allow you to edit birthdays natively in the contacts app.

In comparison to other apps Edit Birthday uses the original datastore and no 3rd-Party databases that would need extra synchronisation.

You can either open Edit Birthday and then select a contact or you use the stock contacts app and then select "edit contact" and choose "Edit Birthday".

You can also try the app "Edit Birthday (Beta)" which is a beta version with additional features including support for dates before 1970, removing of birthdates and many more.