The birth year field is a bit weird
It's an integer field, therefore it has those [+] [-] buttons on the right of the field, which are... mkay I guess.
But then it starts at "empty", which really means 0. That makes the [+] button useless: nobody in their right mind will click that button until it reaches 1985.
We can't just set it by default to a more reasonable value like "1997" (say, if twenty year-olds are the main target user group), because then we won't know when people just didn't enter anything.
I'm not entirely sure how to best fix this.