Daylight saving time (DST) starts every March in most parts of the United States, requiring people to set their clocks forward by one hour. This results in darker mornings but extends daylight in the evening. DST was originally created to save energy and make better use of daylight, but it can affect sleep by disrupting the body’s internal clock. Studies show that these sleep disturbances can last for weeks. Research also links DST to a short-term increase in heart attacks, strokes, and traffic accidents, raising concerns about its health effects. While most of the U.S. follows DST, states like Hawaii and most of Arizona remain on standard time. Many other countries also use DST, but their schedules differ. To adjust more easily, experts recommend gradually shifting sleep schedules. Going to bed 15–20 minutes earlier before the time change can help. Getting morning sunlight also helps reset the body’s clock, improving sleep and overall health. Lawmakers continue to debate whether to keep switching times or choose one permanent schedule, with experts favoring standard time for better sleep.