I go back and forth on this. In the early (earlier - lol - I'm still early) part of my sobriety I was almost obsessed with counting days. That was not good. It put so much extra pressure on me, and it made the days last FOR-EV-ER. By the time I made it through one day it felt like I had been through a whole week. So, I wrote down my sobriety date and said you know what, feck it. If I think about it on any given day, I can calculate it if I want to. Otherwise I'm done thinking about it.
It was just too hard to have to make it through the day without drinking AND worry about how many days it had been. So yeah, I can tell you when I stopped and I can even add it up if I stop and think about it for a minute, but I'm not obsessing about it like I used to. It's a relief.
Just worry about today. The others are right.