What's actually to reduce the electricity consumption by extending the daylight hours in the US We change our clocks at 2 a.m. On the second Sunday in March that begins daylight saving time.

其實什麼是通過延長美國的白天時間來減少電力消耗，我們在3月的第二個星期日凌晨2點換鍾，開始了夏令時。

That's when we spring ahead on the first Sunday in November, we change our clocks at 2 a.m. Again, that's actually just going back to standard time.

那就是當我們在11月的第一個週日提前春運的時候，我們會在凌晨2點換鍾，同樣，這其實只是回到了標準時間。

Believe it or not, that started with an idea from Benjamin Franklin.

不管你信不信，那是源於本傑明-富蘭克林的一個想法。

Franklin did write an essay suggesting that people could use less candles if they got up early and made better use of daylight in 1918.

富蘭克林在1918年確實寫過一篇文章，建議人們如果早起，更好地利用日光，可以少用蠟燭。

The standard time act established time zones in daylight saving time.

標準時間法規定了夏令時的時區。

But not all states participate.

但不是所有的州都參加。

To this day.

到今天為止。

Most of Arizona in all of Hawaii do not change their clocks.

亞利桑那州的大部分地區在整個夏威夷都不會改變他們的時鐘。

Over 70 countries across the world observe daylight saving time with notable exceptions of China in Japan in 2007 we actually change the date of when we set our clocks back an hour to the first week in November.

世界上有超過70個國家實行夏令時，除了中國之外，日本在2007年實際上將時鐘調回一小時的日期改為11月的第一週。

This help protect trigger traders by giving them an extra hour of daylight.

這有助於保護觸發式交易商，給他們額外的一個小時的日光時間。

One of the other lines of thinking was that would have a better voter turnout on election years, experts say.

專家表示，另外一個思路是，會在選舉年有更好的投票率。

Each time you change your clocks, it's always a good idea to change those batteries in your smoke detector and always look forward to fall when you get that extra hour of sleep mhm.

每次換鐘的時候，總是要換掉煙霧探測器裡的那些電池，總是期待著秋天的時候，你能多睡一個小時嗯。