So he put a bullet in the chamber, spun the revolver, squeezed the trigger and that chamber was empty. That's what taking one drink would be like for me. Except every time I took one drink after long-term sobriety (6.5 years once and 7 years another time) I found that the chamber was always loaded.
But I agree that he is the only one that can decide if he needs to change his sobriety date. To thine own self be true.