I hate to tell you, but you may never find out. I tried the same thing last year, with no luck. Roxy's tag begins with FX and all that means is that she came from Florida Exotics. But when I called them, I got nowhere because they do not keep that information on their babies. They literally ship out thousands every year. And the rest of her band is numbers that have absolutely nothing to do with age or the year she was hatched. It's just a serial number. The BEST thing you can do is contact the guy from craig's list and ask him what store he bought him from, and then contact the store. Pet stores have to keep that information on file. That is how I found my bird's hatch date.