What is the furthest year into the future selectable as an Iphone contacts actual birthday?

Can’t believe I just rolled it past 11500 and its still going! It goes back as far as 1 too!!!

Well, it should only go to 2012.

The furthest year might actually be the largest number possible to store in whatever format the phone is using. For example, you can store up to 254 in eight bits, but almost all computers can store things up to 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000, or 10^100, now. If this wheel existed, it would be ~3.1831*10^99 units across.

@PhiNotPi makes a valiant attempt, but I don’t think this is cased closed.