Got it. Thanks.
Can't hurt to try.
I'm not planning to use it for myself (I don't have iTunes, and I was told by a knowledgeable Mac person that I'd have to download the songs I want, burn them to a CD, and then rip them back to my computer). I'd like to give it to a friend of mine who does have all the Apple stuff, but I don't want to do that if it's expired.
You have to get iTunes to download the songs in the first place. But for use in other places, suggest to your friend downloading their non-DRM music. The burn-rip dance is then unnecessary. You can play it in anything that handles AAC files.
Just looked it up, expires in two years from date of issue or two years from date of last activity on iTunes, whichever is later.