Ian,

I had the same issue several years ago. There are two options to fix this, one is to have the GPS engine replaced, and one is to pray. I selected the prayer method (as recommended by Garrecht) and that worked for me. Replacing the GPS engine will likely cost more than the logger is worth.

The prayer or self healing method requires that you put the logger to sleep for several weeks until it looses its position completely. The older the logger is, the quicker this happens (due to the degradation of a non-replaceable battery in the GPS itself). When the logger is brought back up after several weeks or months, it will likely reconstruct the correct year.

Thomas