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Summer time is a technique, bar a day on the development of 1 hour watches throughout the summer. For the period of summer time, the sun after an hour in the morning, and people are usually already snoozing and, after an hour in the evening to extend the day.

Note: Between March and April-September-November, summer in the northern hemisphere, in several countries where the surveys may DST, while in the southern hemisphere, it is the winter. While the rest of the year, the substantive contradictions: It’s summer in the south and winter in the northern hemisphere.

First, Benjamin Franklin suggested in daylight saving time in 1784, but summer time is not on the eve of World War I in 1916 to summer time was heard by a number of departments in Europe, first, the idea.

And it is difficult to predict what it is summer time in the future. Several countries to change the date on certain conditions or events. Canada, the United States and some other countries in the extended DST in 2007. And the cost of beginning is the 2 Sunday of the month of March throughout the primary Sunday in November.

Summer time in the world
Today, some 70 countries use daylight saving time in at least part of the country. Japan, India and China are the only major industrialized countries, which do not observe some form of summer time.

When summer time?

Summer Time or Daylight Saving Time begins and ends.

United States
United States, DST begins at 2:00 am local time, on the second Sunday in March and returns to standard time at 2:00 am local time on the first Sunday of November. Summer time is not in Hawaii or Arizona, with the exception of the Navajo Nation, the DST, even in Arizona. In 2009, DST begins on March 8 and ends on November 1st. In 2010, DST begins March 14 and ends November 7.

European Union
The EU summer time begins to 1:00 hours of the meridian of Greenwich, the last Sunday of March and the standard time of 1:00 GMT on the last Sunday of October. Edit all time zones at the same time. While European nations have used a time of season for decades, during the years 1996 to EU standards of the summer period. In 2009, DST starts on 29 March and ends on October 25. In 2010, DST begins March 28 and ends October 31.

Litigation
Even in countries where DST DST have been for many years, many people of the intensity of the aversion semestriels time.

Contradictions around him and DST DST:

Sleep disorders
Many people complain about the inconvenience to adapt to a new sleep schedule, when the time changes. This is a nuisance for most people with sleep disorders, the transition can be very difficult.

Lost productivity
There are signs that the work productivity decreases, as the time change.

The severity of car accidents
There are signs that the seriousness of car accidents increases, as is time to change.

Inconvenience
Often complain about the inconvenience of changing their watches twice per year.

Dérangé morning
The man, who at dawn, or whose listings are otherwise Sunrise, complain about the adaptation. Canadian poultry producer Marty Notenbomer: “The hen does not adapt to change hours to weeks, while the first week of April and the last week of October is very frustrating for us.

Religious practices
In Israel, ultra-Orthodox Sephardic Jews have against summer time, as they recite prayers Slikhot penitentiary in the early hours of the morning in the Jewish month of Elul.