That will help greatly with my blog entries. I've tried looking on the boxes, and I can identify the word "month", but I don't see "year" on it, let alone any numbers that suggest a year.
Would you happen to be familiar with a "Subaru Special Color Ver."? They do a special release of what looks like the SS.4 release, recolour each WRC car in the roster to a solid colour with no livery.
According to the illustration on the box, this release contains the Legacy RS (the only one not in the SS.4 series), Imprea WRX, Impreza WRC 1999, Impreza WRC 2002, Impreza WRX 2005, and Impreza WRC 2006 Prototype.