A sober birthday is the day that marks the end of a person’
s addiction. Some individuals will use the last day that he or she used
drugs to
mark his or her sober birthday, or the day after the last
time they used.
Most of all, a sobriety birthday (also known as a sobriety anniversary, sober anniversary, recovery anniversary, or sobriety milestone) also serves as a reminder of the progress you've made, and the new life an addict has chosen for themselves.