Carotid endarterectomy requires an overnight stay in the hospital.
Most patients are back to doing just about everything in 5 to 7 days. The neck heals very quickly and the procedure itself isn't very traumatic (i.e. No muscle is cut or bones broken) which makes the discomfort post operatively mild and short-lived.
I have had a who mc'ed a black tie event for 600 people 3 days post-op!