How to Be Happier in January Than in July

Enjoy the Best Beauty Rest of the Year

As the number of daylight hours decreases in late fall and winter, the pineal gland amps up its production of melatonin, a hormone that makes us feel sleepy. The witching hour comes early and swiftly, and with it a melatonin-induced spell of drowsiness. Add to this optimal sleep conditions: Your bed is warm and cozy; the outside world is cold and crepuscular. This is it—the best time of year to get the most sleep naturally (so long as our social calendars don't keep us up).