Dell Financial Birth Date Format? #2

I can't believe Dell is really this bad of a website. I have been trying to create my Dell Financial Services account. But when validating the account, it keeps saying my date of birth is wrong. I have tried every which way to enter my date of birth in different formats and it keeps saying invalid date. This is so infuriating. And this stupid thing they haven't fixed in a decade. Shame on you guys.