The debate: Most of the United States spends 34 weeks on daylight saving time. Changing the clocks twice a year has become widely viewed as not only an inconvenience, but also as a serious health and public safety concern.
How DST originated: For roughly two decades, nobody had any clue what time it was, with some localities observing daylight saving, some not — until President Lyndon B. Johnson signed the Uniform Time Act in 1966.
Around the world: Brazil eliminated daylight saving time. Now it’s light out before 5 a.m., and people aren’t happy.