There is a CRV owners group forum on the internet. The first of this year my wife’s car radio with the navigation system started to default to 1/1/2002. Local Honda dealer had never heard of the problem but was more than willing to have me bring the car in so they could charge me a service fee, I mean diagnose the problem. There were over 200 people on the forum that were having the same issue. Turns out it is a bug with the 32 bit operating system (think Y2K stuff). There is no know fix for it at this time.
Check out the forum. Someone probably has the answer there.