一群的米國番

美國的時間不太一樣的

有冬令時間, 夏令時間

冬令時間是把時鐘往後調一小時

英文他們叫: Daylight saving time 及節省白天日照時間

這原本的來由是因為節省能源的

這個節省時間會在春天時往前調回來

-----夏威夷州, 阿拉斯加州及大部分的亞利桑那州是不參與這個規定的-----

菲利浦媽媽也常常無法搞清楚是哪一天要調時間的

且秋季/ 春季時是往前調還是往後調哩??

以前有一位老太太教我一招

當我們描述往下掉是用: Fall Back

Fall除了是往下掉< 亦即是秋天的意思

所以秋天是往後調一個小時的

而哪一天調哩?

目前的規定是十一月的第一個禮拜天開始, 三月的第一個禮拜天結束

但是忙忙碌碌的我們< 除了別人提醒, 又哪會記得呢?

還好現代的手機都會有自動調整時間的功能 (好個家在)

所以, 不要忘記時間已經往後調囉, 不然你將會不是做找去上班的就是第一個到學校的

不過< 早到總比遲到好

最怕的是春天的往前調, 厚, 失去的那一小時常常要花好些時間習慣的

今年春天的時候我們就全部的人都遲到了!

但是我今天真是多了一個小時的 "美國時間" 哦!

以下是英文的說明:

Starting in 2007, daylight time begins in the United States on the second Sunday in March and ends on the first Sunday in November. On the second Sunday in March, clocks are set ahead one hour at 2:00 a.m. local standard time, which becomes 3:00 a.m. local daylight time. On the first Sunday in November, clocks are set back one hour at 2:00 a.m. local daylight time, which becomes 1:00 a.m. local standard time. These dates were established by Congress in the Energy Policy Act of 2005, Pub. L. no. 109-58, 119 Stat 594 (2005).

Not all places in the U.S. observe daylight time. In particular, Hawaii and most of Arizona do not use it. Indiana adopted its use beginning in 2006.

• In 2006, daylight time begins on April 2 and ends on October 29.
• In 2007, daylight time begins on March 11 and ends on November 4. [New law goes into effect.]
• In 2008, daylight time begins on March 9 and ends on November 2.
• In 2009, daylight time begins on March 8 and ends on November 1.

Many other countries observe some form of "summer time", but they do not necessarily change their clocks on the same dates as the U.S.

Daylight time and time zones in the U.S. are defined in the U.S. Code, Title 15, Chapter 6, Subchapter IX - Standard Time.

History of Daylight Time in the U.S.

Although standard time in time zones was instituted in the U.S. and Canada by the railroads in 1883, it was not established in U.S. law until the Act of March 19, 1918, sometimes called the Standard Time Act. The act also established daylight saving time, a contentious idea then. Daylight saving time was repealed in 1919, but standard time in time zones remained in law. Daylight time became a local matter. It was re-established nationally early in World War II, and was continuously observed from 9 February 1942 to 30 September 1945. After the war its use varied among states and localities. The Uniform Time Act of 1966 provided standardization in the dates of beginning and end of daylight time in the U.S. but allowed for local exemptions from its observance. The act provided that daylight time begin on the last Sunday in April and end on the last Sunday in October, with the changeover to occur at 2 a.m. local time.

During the "energy crisis" years, Congress enacted earlier starting dates for daylight time. In 1974, daylight time began on 6 January and in 1975 it began on 23 February. After those two years the starting date reverted back to the last Sunday in April. In 1986, a law was passed that shifted the starting date of daylight time to the first Sunday in April, beginning in 1987. The ending date of daylight time was not subject to such changes, and remained the last Sunday in October. The Energy Policy Act of 2005 changed both the starting and ending dates. Beginning in 2007, daylight time starts on the second Sunday in March and ends on the first Sunday in November.

For a very readable account of the history of standard and daylight time in the U.S., see

Ian R. Bartky and Elizabeth Harrison: "Standard and Daylight-saving Time", Scientific American, May 1979 (Vol. 240, No. 5), pp. 46-53.