Pedantic, but I think on the initial screen this should say "Enter your birthdate" (or "date of birth") rather than "birthday" - the former is when you were born, the latter is the thing you celebrate every year.
To be more pedantic, the thing you celebrate yearly is the anniversary of your date of birth. Your birthday is the same as your date of birth. Plus, "date of birth" is a pleonasm IMO since "birthday" is shorter.
