夏時間を恒久化すべきではない。その理由はここにある
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Why doesn't Arizona observe daylight savings?
Do NOT End Daylight Savings Time!
Pet Talk: Pet Activity on Shorter Days
サマータイム入門 | ナショナルジオグラフィック
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Its Daylight Saving Time not Daylight Savings Time!
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What three U.S. states do not observe daylight saving time?
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Fixing Daylight Saving Time Is THIS Easy
