According to the New York Times, Trump typically retires for the day at around 6:30 pm and then roams around the White House and tweets in a bathrobe like some kind of bizarro Lebowksi.
I'd call that good news for reasons I'll add, but the Times story also contains this alarming nugget:
Mr. Priebus bristles at the perception that he occupies a diminished perch in the West Wing pecking order compared with previous chiefs. But for the moment, Mr. Bannon remains the president’s dominant adviser, despite Mr. Trump’s anger that he was not fully briefed on details of the executive order he signed giving his chief strategist a seat on the National Security Council, a greater source of frustration to the president than the fallout from the travel ban.
When I quipped that Trump is signing whatever Bannon tells him to sign, this isn't exactly what I had in mind, but here we are. Trump clearly isn't reading the orders he signs. One wonders if you could trick him into signing his own resignation.
It's good news that Trump typically quits working for the day at 6:30 (and that his staff can't find the light switches) because that limits the number of hours in a day that Trump can destroy things.
To put it another way, if we make it to 6:30 eastern time without witnessing the apocalypse, we're probably safe for the night.
For comparison, President Obama often worked until midnight.