I have been sober for...hmmm.....well, the last time I was drunk was August 13, 2007, but I did intentionally have some champagne for my wedding anniversary in early October....so I chose to change my sobriety date to the October date, but I do not let the fact that I "slipped" and chose to drink affect my feeling about my overall recovery. Someone said to me here and also at a meeting something along these lines:" Ok, you slipped. You got up the next day, faced the "music", hit a meeting and got on with recovery." I was really down on myself until I had a friend here tell me that even thought I made a mistake and drank that one evening, I was still miles ahead of where I had been in August when I first got sober, and all was not lost because of my one bad choice. So, I guess, whatever you choose to say your sobriety date is, just don't let yourself feel that you "lost" sober time because you drank once.