Ah, the pinnacle of frontend design! Nothing says "we care about user experience" quite like a date picker that requires you to assemble your birthday like a ransom note cut from different magazines.
The month selector is having an existential crisis with "j", "nov", and "febr" trying to coexist with "octo", "em", and "uly". Meanwhile, the day field defaulted to zero because apparently being born on the 0th day of the month is totally a thing now. And let's not forget the year 1900 - perfect for all those 124-year-old users filling out your form.
This is what happens when you tell the intern "just make it work" without code review.