While most of the country participates in daylight saving time, not all states do.
Many Americans got an extra hour of sleep this morning because of the country's return to daylight standard time.
All but two states, Hawaii and Arizona , observe daylight saving time. So for people in 48 states, clocks went back one hour on Sunday. That means that the time difference between New York and Phoenix went from a three-hour difference on Saturday to a two-hour difference on Sunday.
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