This bug takes a YEAR to replicate!
Every year, roblox takes out one year from the age you can set your account.
If you set your birth date to the oldest availible date (set my birth date to 1923 a while ago) and check your settings there is no birth date showing, even though it DOES show on the Api.
Expected Behaviour:
It should show the actual birth date, as you can see on the Api it tells you the birth date of the account being 1923: