UX that suck

I am not the most anal-retentive person, but I do appreciate web pages that are well-designed.  I also resent professional organizations that make web sites that are less well-designed than a typical 8th grade class project.  I recently experienced one that falls more into the later category.  I had to pay a medical bill so I went to the hospital’s on-line payment site and filled in the information:

notice that I selected June 31 as her birthday.  I then hit submit and I got this:

Basic input validation should be part of any site –especially one that deals with medical/financial transactions.  I didn’t try to do a sql injection attack, but if I was a betting man, I would bet that this site is vulnerable to that too…