lastdayone, you and I have a similar dilemma. Unwittingly (for me at least) we picked a user name that compels us to succeed and stay sober. You see, for me, I had never seriously tried to quit during my 20 years of heavy drinking. Not until I found SR that is. So when I joined SR I picked a user name, firstymer, that described who I was.
If I were to fail and start drinking again, I would feel compelled to change my user name from firstymer to, what, secondtymer? And as stupid as it sounds, that choice of user names may once or twice have kept me from picking up the bottle again when I was feeling weak.
So, like it or not, you have described this as your last day one. And like me, you are stuck with the name you chose.
Good luck, lastdayone. I am glad you are here with us.