Is it normal that after a few days sober i could focus and think clearer

A year ago I lost a job because of alcohol. I had a different job for a year now and if I drink the night before work I only drink 1 or two cans of beer(stress) but when I'm not stressed then I'll not drink at all. I noticed on the weekend when I drink and then sober up for work the first one or two days my brain isn't as focused compared to the end of the work week. At the end I am more analytic and think more clearer at work.