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結果 : why did the united states adopt daylight savings time
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Why Does America Observe Daylight Saving Time?

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Daylight Saving Time: What would change if we stopped changing the clocks?

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North Dakota HB 1259: Senate floor vote (2025-04-07)

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US tried permanent Daylight Saving Time in 1973

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DAYLIGHT saving time in the UNITED STATES - WikiVidi Documentary

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