CNN News:美国11月1日结束夏令时 时钟要回拨一小时

Which of these events occurs on November 1, 2020? U.S. presidential election, first day of fall, Standard Time switch or space telescope launch? November 1 is when we fall back to Standard Time, setting our clocks back one hour.
Falling back has its supporters. You can get that extra hour of sleep but only if you go to bed on time. As the days get shorter, the switch to Standard Time keeps sunrise a little closer to when we wake up. And Daylight Saving Time, which we're on right now does conserve a bit of electricity.

But people of the American Academy of Sleep Medicine want to get rid of the time switch. Specifically they want to end Daylight Saving Time which means we'd fall back but never spring forward again. The problem, some experts say, is because it takes our bodies days to adjust to an altered sleep schedule and that a third of Americans don't get enough regular sleep anyway.
This reportedly leads to all kinds of health problems. If the time changes stay though, experts say we can ease the transition by gradually adjusting our sleep schedules before falling back or springing forward.