Yes, the Secret to Being Happier Is This Simple

Round-the-world proponents of sleeping in are shaking their heads in unison right now, thinking, Duh, I could have told you that! A recent study from Jawbone, which collected the data of thousands of Jawbone Up wearers who use the activity band to log sleep and mood, suggests that more than any other part of your day (exercise or eating a healthy meal, for example), sleep is the number one predictor of a better mood.

So what's the sweet spot for shut-eye? Data suggests that people who sleep between eight and nine and a half hours a night tend to wake up happier. Anything less—or more, for that matter!—correlated with worse moods in those monitored. And all you night owls ought to pay attention: The study found people to be twice as unhappy when they lost two hours of sleep from their usual sleep patterns.

As far as mood patterns go, the study also found that people were happiest around 11 a.m. on Friday and unhappiest at 2 a.m. on Wednesdays (time to turn off Netflix and go to sleep!). On weekends, people were happiest around 10 a.m. on Saturday and unhappiest at 11 p.m. on Sundays (hello, ubiquitous pre-Monday anxiety).

Are you surprised by these findings? Tell us in the comments, then head to Jawbone to read more.