The first sobriety milestone most problem drinkers hit is 1 day. Then you hit 1 week, then 1 month, then 100 days, and then the first real biggie is 1 year. After that they lose a bit of meaning as the novelty falls away, and you’re left in a weird sort of booze-free purgatory; a strange coffee-scented realm which exists between the pink clouds of your new exciting sobriety, and your inevitable grey, sober, lonely DEATH. Slowly it dawns on you; the acceptance that this is your life now. I’ve got no facts or figures to back it up (fuck pie charts and proper research, right?) but I’d imagine this 1 year mark to be the point at which a lot of people start jumping off the wagon.