WASHINGTON — In just a few weeks, millions of Americans will gain an hour of sleep as daylight saving time ends.

On Sunday, Nov. 2, clocks around the U.S. will "fall back" an hour at 2 a.m.

While most states follow this biannual clock change, Arizona and Hawaii are the only two that don't observe daylight saving time and refuse to roll their clock forward and backward each year. The two states are outliers in comparison to the rest of the U.S., relying on a loophole in the 59-year-old federal law that requires states to stay on daylight saving time.

That's right, Congress decides if we can have that extra hour of sleep.

The Uniform Time Act of 1966 mandates that the country use daylight saving time, but it allows states to opt out and exempt themselves from the practice of staying o

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