The only problem for me, when I decided to go 30 days without drinking (and it truly was, for me, a piece of cake) was that the whole time I couldn't wait until I could drink again. I was counting down, not counting up (the way I do my sober days).
It doesn't hurt to give it a shot, but don't expect to experience the best of being sober after 30 days. It takes a lot longer to really get to the point where you appreciate the difference, in my experience.