We all love a weekend lie‑in, but could a longer snooze on a Sunday morning be pushing you towards the blues? That’s the suggestion from a new U.S. study that found when you sleep is just as important as how much shut-eye you get. People who don’t stick to regular sleeping and waking times are more likely to become depressed than those who do, the findings, just published in the journal NPJ Digital Medicine, and conducted by researchers at the University of Michigan, found. Those who regularly stayed up late, or got the fewest hours of sleep, also scored higher on depression symptoms and lower on daily mood [File photo]