Every March in the United States, 48 out of 50 states move their clocks ahead an hour to begin daylight saving time (DST). While many people look forward to that extra hour of daylight in the evening, DST may cause adverse effects as well.nnResearch shows that fatal car accidents increase more than six percent in the week following the spring forward time change. That disruption to the sleep schedule has a serious impact on a person’s health and wellness.