I've been asked in a couple of interviews what year I graduated from college. Of course, I think an offer should be made contingent on showing proof of degree with transcripts that will indicate graduation date.
One of the jobs I landed, so it wasn't a big deal. That was several years ago. I didn't get the most recent one. Personally, it was a sign the person didn't know what they were doing and probably did me a favor. There were several indicators that I would not like the job.
Is this a form of age discrimination I need to look out for in the future?
EDIT: Just had another one like this. I usually list relavent experience going back ~12 yrs to keep the resume length shorter and was asked if this was my first job (refering to the oldest position listed). To top it off, the person refered to me as "... a young man like you." It was a phone interview.