How on earth would that work? You're going to have to disclose your DOB at some point in the process to landing a job or applying for a loan regardless of any 'age discrimination'.
You probably can't even open a bank account without specifying your DOB, let alone get a job or a loan.
Job-hunting as a married-but-childless 30 year old woman here is awesome. Not. When I was stupid enough to make the whole "why do we list our family status on our resumes" thing a point of smalltalk towards the end of one of my first interviews here, the guy cheerfully told me, "oh, because we need to pay a family father of 3 more than we need to pay a single guy"
... and the young, childless wife of an engineer working at that small city's most generously-paying employer? The guy did not seem to believe I needed a job at all. All's well that ends well, and I'm now in a far better job that has a relatively transparent union payscale, but it stung at the time.
My husband, a German, has told me that you used to also list the occupations of your parents!