I had done the same thing, deciding to quit on a day with some b.s. significance. It was always just another excuse in a long line of excuses to just keep drinking. For a lot of alcoholics such as myself that was kind of the last veil to drop before we had that epiphany... the feeling that we were going to stop very soon, just after this one last, significant send-off... but (conveniently for addiction) we'd find there was just one more left after that... then another appeared...
I think I had decided I needed to make my last drink something
special. That was my last excuse to pick up. The irony of my needing to make my last drink a special one is that I don't even remember now what it was.