Don't get hung up on numbers. As a former booze hound I would play those games and go weeks sometimes months just trying to hang on. Then I'd break down and "have a few drinks" that somehow turned into a two month bender. Better to just say you're not drinking today. If the whole sobriety thing turns out not to be for you and you really want to have a drink tomorrow, you always can. But just not today. You'll be surprised at how many todays can pass before a tomorrow comes when you're not focused on some end number.