Oh no you don't: No post left behind! :)
365 days ago you crossed the line and it sucks and there's no taking it back. But life goes on and we all have to make peace with ourselves. "Your past is not who you are" as my BW told me.
So, ok, mark the day. Grieve, mourn, reflect, put a rose on the grave of your old dead marriage. But be gentle with yourself.
Today is the first day of the rest of your life and a continuation of all the positive steps and actions you've taken for the past 365 days.
I raise my glass (of water) to you, NGU, and to all you waywards. May we all find peace.