Work after surgery!!!
I think it's different for everyone. I would plan at the very least a week, two would be better. And see if you can go back for half-days before returing to full ones. I know with my first few days back by mid-day I was really tired. If you are not ready by your scheduled return date, take more time. You shouldn't push yourself because your body is recovering from substantial surgery and changes.
Best wishes to you!
Best wishes to you!