Presidential sleeping times

The NY Times reports:

President Biden told a gathering of Democratic governors that he needs to get more sleep and work fewer hours, including curtailing events after 8 p.m., according to two people who participated in the meeting and several others briefed on his comments. …

Kevin Munoz, a spokesman for the Biden campaign, said of the president’s comments about more sleep and less late work: “President Bush went to bed at 9, and President Obama made dinner at 6:30. Normal presidents strike a balance, and so does Joe Biden. 

President Bush would get up at 5 am and be working before 7 am. It is because of that he would usually go to bed by 9 pm.

Obama did always do dinner at 6.30, but would often work through until 2 am.

Bill Clinton was known to ring cabinet members after 1 am.

These are not the same as someone whose own staff say he is only good for six hours a day.