什么时候拨时间，往前还是往后
- 主题发起人 denny
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- 2002-01-24
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夏令时 (Daylight Saving Time) 比标准时晚一个小时。例如，在夏令时的实施期间，东部标准时间的上午10点就成了东部夏令时的上午11点。
在夏季，加拿大基本上都实施夏令时，通常它开始于四月份的第一个星期天，结束于十月份的最后一个星期天。仅有萨斯喀彻温省还未实施夏时制。
Worldwide daylight saving
Today approximately 70 countries utilize Daylight Saving Time in at least a portion of the country. While European nations have been taking advantage of the time change for decades, in 1996 the European Union (EU) standardized an EU-wide "summertime period." The EU version of Daylight Saving Time runs from the last Sunday in March through the last Sunday in October. During the summer, Russia's clocks are two hours ahead of standard time. During the winter, all 11 of the Russian time zones remain an hour ahead of standard time. With their high latitude, the two hours of Daylight Saving Time really helps to save daylight. In the Southern Hemisphere where summer comes in December, Daylight Saving Time is observed from October to March. (The clock at above right is viewed from within the Musée d'Orsay in Paris.)
Not the tropics
Equatorial and tropical countries (lower latitudes) do not observe Daylight Saving Time since the daylight hours are similar during every season, so there is no advantage to moving clocks forward during the summer. China has had a single time zone since May 1, 1980 observing summer DST from 1986 through 1991; they do not now.
List of countries
Most countries that observe daylight saving time are listed in the table below. They all save one hour in the summer and change their clocks some time between midnight and 3 am.
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Continent Country Beginning and ending days
Africa
Egypt Start: Last Friday in April End: Last Thursday in September
Namibia Start: First Sunday in September End: First Sunday in April
Asia
Most states of the former USSR Start: Last Sunday in March End: Last Sunday in October
Iraq Start: April 1 End: October 1
Israel (Estimate, Israel decides the dates every year) Start: First Friday in April End: First Friday in September
Lebanon, Kirgizstan Start: Last Sunday in March End: Last Sunday in October
Mongolia Start: Last Sunday in March End: Last Sunday in September
Palestine (Estimate) Start: First Friday on or after 5 April End: First Friday on or after 5 October
Syria Start: April 1 End: October 1
Iran Start: the first day of Farvardin End: the first day of Mehr
Australasia
Australia - South Australia, Victoria, Australian Capital Territory, New South Wales, Lord Howe Island Start: Last Sunday in October End: Last Sunday in March
Australia - Tasmania Start: First Sunday in October End: Last Sunday in March
Fiji Start: First Sunday in November End: Last Sunday in February
New Zealand, Chatham - (read law) Start: First Sunday in October End: Third Sunday in March
Tonga Start: First Saturday in October End: First Saturday on or after 15 April
Europe
European Union - (read law)
UK - (read law)
Russia Start: Last Sunday in March at 1 am. End: Last Sunday in October at 1 am
North America
United States, Canada, Mexico St. Johns, Bahamas, Turks and Caicos Start: First Sunday in April End: Last Sunday in October
Cuba Start: April 1 End: Last Sunday in October
Greenland Same as EU
South America
Brazil Start: First Sunday in October End: Last Sunday in February
Chile Start: First Sunday on or after 9 October End: First Sunday on or after 9 March
Falklands Start: First Sunday on or after 8 September End: First Sunday on or after 6 April
Paraguay Start: First Sunday in October End: Last Saturday in February
Antarctica Antarctica (varies, see below)
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Note that there are many oddities. For example, some parts of the US and Canada do not observe Daylight Saving Time, such as the state of Arizona (US) and the province Saskatchewan (Canada).
在夏季，加拿大基本上都实施夏令时，通常它开始于四月份的第一个星期天，结束于十月份的最后一个星期天。仅有萨斯喀彻温省还未实施夏时制。
Worldwide daylight saving
Today approximately 70 countries utilize Daylight Saving Time in at least a portion of the country. While European nations have been taking advantage of the time change for decades, in 1996 the European Union (EU) standardized an EU-wide "summertime period." The EU version of Daylight Saving Time runs from the last Sunday in March through the last Sunday in October. During the summer, Russia's clocks are two hours ahead of standard time. During the winter, all 11 of the Russian time zones remain an hour ahead of standard time. With their high latitude, the two hours of Daylight Saving Time really helps to save daylight. In the Southern Hemisphere where summer comes in December, Daylight Saving Time is observed from October to March. (The clock at above right is viewed from within the Musée d'Orsay in Paris.)
Not the tropics
Equatorial and tropical countries (lower latitudes) do not observe Daylight Saving Time since the daylight hours are similar during every season, so there is no advantage to moving clocks forward during the summer. China has had a single time zone since May 1, 1980 observing summer DST from 1986 through 1991; they do not now.
List of countries
Most countries that observe daylight saving time are listed in the table below. They all save one hour in the summer and change their clocks some time between midnight and 3 am.
--------------------------------------------------------------------------------
Continent Country Beginning and ending days
Africa
Egypt Start: Last Friday in April End: Last Thursday in September
Namibia Start: First Sunday in September End: First Sunday in April
Asia
Most states of the former USSR Start: Last Sunday in March End: Last Sunday in October
Iraq Start: April 1 End: October 1
Israel (Estimate, Israel decides the dates every year) Start: First Friday in April End: First Friday in September
Lebanon, Kirgizstan Start: Last Sunday in March End: Last Sunday in October
Mongolia Start: Last Sunday in March End: Last Sunday in September
Palestine (Estimate) Start: First Friday on or after 5 April End: First Friday on or after 5 October
Syria Start: April 1 End: October 1
Iran Start: the first day of Farvardin End: the first day of Mehr
Australasia
Australia - South Australia, Victoria, Australian Capital Territory, New South Wales, Lord Howe Island Start: Last Sunday in October End: Last Sunday in March
Australia - Tasmania Start: First Sunday in October End: Last Sunday in March
Fiji Start: First Sunday in November End: Last Sunday in February
New Zealand, Chatham - (read law) Start: First Sunday in October End: Third Sunday in March
Tonga Start: First Saturday in October End: First Saturday on or after 15 April
Europe
European Union - (read law)
UK - (read law)
Russia Start: Last Sunday in March at 1 am. End: Last Sunday in October at 1 am
North America
United States, Canada, Mexico St. Johns, Bahamas, Turks and Caicos Start: First Sunday in April End: Last Sunday in October
Cuba Start: April 1 End: Last Sunday in October
Greenland Same as EU
South America
Brazil Start: First Sunday in October End: Last Sunday in February
Chile Start: First Sunday on or after 9 October End: First Sunday on or after 9 March
Falklands Start: First Sunday on or after 8 September End: First Sunday on or after 6 April
Paraguay Start: First Sunday in October End: Last Saturday in February
Antarctica Antarctica (varies, see below)
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Note that there are many oddities. For example, some parts of the US and Canada do not observe Daylight Saving Time, such as the state of Arizona (US) and the province Saskatchewan (Canada).
