I've definitely noticed that this works for me on occasion - staying up all night to see the sunrise and then going about as usual seems to be a cleansing exper

I've definitely noticed that this works for me on occasion - staying up all night to see the sunrise and then going about as usual seems to be a cleansing experience of sorts. In such a state, it feels that the mind is too exhausted to lend itself to worry or anxiety. The troubles seem far less consequential through the haze. I didn't keep track of what happens the day after catching up on sleep, but in general, being lifted even for a single day out of the quagmire is very helpful: one can make plans for the future (in a depressed state, people tend to not make any plans because they don't want anything, and what they want, they think they can't do), and one can feel contrast between their good and bad states of mind (depression tricks people into thinking that their depressed state is actually their normal state). That said, sometimes staying up all night just meant sleeping all day -- and I don't know to which extent my experience even compares with the one of the people in the article. Still, it's something everyone suffering from the symptoms can try for free. Beats a night of restlessness and bad sleep hands down, and there's little to lose if you experiment on a weekend.