Daylight Saving Time: Why we change clocks twice a year, and why not everyone is on board

Описание: Daylight saving time ends Sunday, Nov. 5, rolling back the clocks an hour in the middle of the night and granting most Americans an extra hour of sleep as they "fall back."

Only two U.S. states, Arizona and Hawaii, don't observe daylight saving time at all, refusing to roll their clocks forward and backward every year. But Hawaii and Arizona are outliers, relying on a loophole in a 57-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 the country use daylight saving time, but allows states to opt out and exempt themselves from the practice to stay on standard time year-round. It does not allow states to permanently establish daylight saving time, which would keep them an hour ahead from November to March while other states switch to standard time.

Many states have passed measures to stay on daylight saving time permanently — a move that some have called "lock the clock." For some states, they're willing to go forward with it as long as a few of their neighbors do the same. #WakeUpCLT #Daylightsavingtime

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