Biden just calls a "lid" after a couple of hours where he doesn't miss his naps...The President is never "Off duty" but he doesn't usually schedule much on the weekends. He doesn't need meetings all weekend to do that.
At least he doesn't start every weekday at 11 am and then knock off to golf.
Then, according to CNN, he goes to bed early....
CNN Reports That Biden Heads to Bed Early, Wants A Fireplace Put In the Oval Office | Story Warrant