When I reported to Elon, we would have X product meetings at 5 or 6pm (because he was with the Tesla team for 10 hours before that), then my 1:1 checkin would be at 10pm, but that would regularly get moved to 11pm or midnight or 1am. Usually around 2am, he’d go take a nap for a couple hours in the office and then repeat the same schedule again the next day with a different set of companies, 7 days a week.