回退：关于夏令时你不知道的事

When daylight saving time ended on Sunday, November 7, we gained an hour of weekend shut-eye. But we also also lost hour of evening light through March 13, 2022, when it will be time to "spring forward" again.

In observance of daylight saving time, here are some things you may not have known about this event.

It Has an Impact on Your Health

Switching in and out of daylight saving can disturb people's sleeping routines, making them more restless at night, according to U.S. News and World Report. However, morning people tend to be less bothered by the changes. Studies have shown that during the first week of daylight saving time, a spike in heart attacks takes place. Some experts suggest, according to the report, that the loss of an hour's rest may make people more vulnerable to an attack. Nonetheless, when people get an extra hour in the fall, the incidents of heart attacks are less than usual.

Don't Trust Your Phone

Don't depend on your phone to automatically switch the time. In 2013, iPhone customers experienced a daylight saving time bug. Some users saw two different times displayed on their calendar app, which was apparently caused by a change that moved daylight saving time back a week in 2007. In 2010, iPhones had another problem in which the phones did not correctly change alarm schedules when daylight saving time ended, causing some European iPhone users to wake up late for work, while Australians were woken up early.

Not Everyone is a Fan of DST

Hawaii and Arizona, along with U.S. territories Puerto Rico, Guam, American Samoa and the Virgin Islands did not turn forward their clocks last spring. Utah wants to get rid of the time switch, too. More than 40 percent of respondents to a November 2014 Rasmussen Reports poll said they saw no need for the clock changes.

It Has a Founding Father History

The notion of daylight saving time was introduced by none other than one our founding fathers, Benjamin Franklin, according to NASA. The idea was to take advantage of daylight hours by moving the clock backward in the fall and forward in the spring.

Presidents Love Daylight Saving Time Laws

Daylight saving time has been used throughout most of the U.S., Canada and Europe since World War I, but it wasn't until 1966 that President Lyndon B. Johnson decided to implement a law stating that daylight saving time would begin the last Sunday of April and end on the last Sunday of October every year. The law allows some states to opt-out.

In 2005, President George W. Bush extended the daylight saving time for an extra four weeks through an energy bill policy. Since 2007, Daylight Saving Time begins on the second Sunday of March and ends on the first Sunday of November.

回退：关于夏令时你不知道的事

当夏令时在 11 月 7 日星期日结束时，我们周末休息了一小时。但到 2022 年 3 月 13 日，我们也失去了一个小时的夜光，届时将是再次“向前”的时候。

为遵守夏令时，以下是您可能不知道的有关此事件的一些事情。

它对您的健康有影响

据《美国新闻与世界报道》报道，切换夏令时会扰乱人们的睡眠习惯，使他们在晚上更加不安。然而，早起的人往往不太受这些变化的困扰。研究表明，在夏令时的第一周，心脏病发作会激增。根据该报告，一些专家建议，失去一个小时的休息时间可能会使人们更容易受到攻击。尽管如此，当人们在秋季多出一个小时时，心脏病发作的次数就会比平时少。

不要相信你的电话

不要依赖手机自动切换时间。 2013 年，iPhone 客户遇到了夏令时错误。一些用户在他们的日历应用程序上看到两个不同的时间，这显然是由 2007 年将夏令时移回一周的更改引起的。 2010 年，iPhone 出现了另一个问题，即手机在夏令时时没有正确更改闹钟时间表时间结束，导致部分欧洲 iPhone 用户上班迟到，而澳大利亚人则早起。

不是每个人都喜欢 DST

夏威夷和亚利桑那州，以及美国领土波多黎各、关岛、美属萨摩亚和维尔京群岛去年春天没有把时钟调快。犹他州也想摆脱时间开关。在 2014 年 11 月的 Rasmussen Reports 民意调查中，超过 40% 的受访者表示，他们认为没有必要更改时钟。

它有一个开国元勋的历史

据美国宇航局称，夏令时的概念是由我们的创始人本杰明富兰克林引入的。这个想法是通过在秋季向后移动时钟和在春季向前移动来利用白天的时间。

总统喜欢夏令时法

自第一次世界大战以来，美国、加拿大和欧洲的大部分地区都使用夏令时，但直到 1966 年，林登·约翰逊总统才决定实施一项法律，规定夏令时将从 4 月的最后一个星期日开始并在每年 10 月的最后一个星期日结束。法律允许一些州选择退出。

2005 年，乔治·W·布什总统通过能源法案政策将夏令时延长了四个星期。自 2007 年起，夏令时从 3 月的第二个星期日开始，到 11 月的第一个星期日结束。