Unobtrusive DateTime? Validation in MVC4

Question

I upgraded an MVC3 solution to MVC4. After the migration, the validator is broken.

My input date, if i select German as language, is \"20.03.2013\". I get an validation

Answer 1

Microsoft suggests to replace the new jquery.validate.js from mvc4 with the old jquery.validate.js from the MVC3 project template. This works, but the funny thing is, the bug is not in MVC4, it was in MVC3.

We use the way which was described by Francesco, see the accepted answer.