Many people report feeling weird during daylight savings changeovers; not only do we lose an hour of sleep in the spring, but our circadian rhythm—our internal clock responsible for regulating our sleep-wake cycle—gets out of whack, which may cause us to feel off. Plenty of people experience brain fog, fatigue or other unpleasant symptoms following the time change. The importance of sleep cannot be underestimated; the brain needs a little time to prepare to get used to the new schedule. Chronic sleep deprivation can lead to a myriad of physical diseases as common as a cold and as severe as diabetes or heart failure. Because we lose one hour of sleep in the spring, there is a possibility of feeling tired. For some, it might not mean much. But for others, it can cause harm, such as an increased risk of traffic accidents, heart attack, and workplace injuries due to lack of sleep.