I don't think it's anything you need to be secretive about or anything (accelerated programs are now pretty common and perfectly legit), but, FWIW, I don't put the dates I attended my various schools
on my CV, just the year I completed the degree (and no one's ever asked
me how long I was at any of the schools). It's not like employment, where it actually matters how long you were with a specific employer -- it just matters that you completed the program and got the degree.
And you list the degree as whatever it says on your actual degree
(which will probably not say anything about it being an accelerated program). You're not earning an "accelerated BSN" -- you're earning a BSN
(via an accelerated program). It's the same degree any other BSN-prepared nurse has.