: A one-hour shift can disrupt the body's internal clock for up to a week, leading to grogginess and sleep fragmentation.
In most of the United States, clocks are set back one hour at 2:00 a.m. on the . An Hour Behind
: Not everyone participates. Regions like Hawaii , most of Arizona , and several U.S. territories stay on Standard Time year-round. : A one-hour shift can disrupt the body's
: Studies have noted shifts in cardiovascular health during these transitions. For instance, some research suggests a 21% decrease in heart attack risk on the Monday following the "fall back," contrasting sharply with a 25% increase when we "spring forward". : Not everyone participates
: The shift "returns" the hour borrowed in the spring, granting more natural light during winter mornings at the expense of earlier sunsets.