Yesterday. Laser may take 10 or more treatment and it's very likely that you will require electrolysis to clean up what's left. With electrolysis you must have 3-4 days growth when you have treatment so unless you are willing to go full time with 5 o'clock shadow, facial hair removal should start 1-2 years before full time. It's unlikely that anybody will notices once you clean shave and if they do, just say you are getting treated for a irritation problem caused by the beard. You won't even be lying about that.