Experts say it's worth easing kids back into a regular sleep routine with the start of a new school year. A good night's sleep helps students stay focused and attentive in class. To get back on track, experts recommend setting earlier bedtimes a week or two before the first day of school — or gradually going to bed 15 minutes earlier each night. Don't eat a heavy meal before bed and avoid TV or screen time two hours before sleep. Instead, work in relaxing activities like showering and reading a story. Parents can adjust based on what works best for their child.

Losing an hour of sleep as daylight saving time kicks in can do more than leave you tired and cranky the next day — it also could harm your health. Darker mornings and more evening sun together knock out of whack a body clock that regulates when we're drowsy and when we're alert. Studies even show an uptick in heart attacks and strokes the first few days after the spring time change. Getting more morning light can help reset your circadian rhythm and get sleep that's vital for good health.

Sunday is the time to move clocks back in the U.S. Daylight saving time ends at 2 a.m. local time on Nov. 3, which means setting your clock back an hour. Standard time will last until March 9 when we will again "spring forward" with the return of daylight saving time. That spring time change can be tough on your body but the fall change should be easier to adjust to. Most countries don't make time changes. It's mostly North America and Europe. In the U.S., there are two exceptions. Arizona and Hawaii stick to standard time year-round.