Day light saving time in the United States starts on the last Sunday in April and ends on the last Sunday in October.
美国夏令时始于四月最后一个星期天终于十月最后一个星期天。
When it is 8:15 p.m. in Paris, New York City's Eastern Day-light Saving time is only 3:15 p.m.
当巴黎是晚上8点15分时，美国纽约市的东部夏令时间是下午3点15分。
Their studies show that our circadian body clocks, set by light and darkness, never benefit from gaining an "extra" hour of sunlight to the end of the day during daylight saving time.
他们的研究显示，我们的生理时钟，主要受日夜调节，不可能从日光节约期间，傍晚多出来的那一小时日照里获得任何好处。
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