What was Daylight Saving Time used for?

In the past, daylight saving time was used to save energy. Daylight saving time saves about 15% of gas and electricity, but to make up for the loss, the electricity and gas company has also increased ** by 15%. France soon followed suit.

In 1917, Daylight Saving Time was introduced in Russia for the first time, but it was not until 1981 that it became a regular system. In 1918, the United States, which participated in World War I, also introduced daylight saving time, but it was canceled immediately after the war. In 1942, during World War II, Daylight Saving Time was introduced in the United States, which was abolished after the end of the war in 1945.

In 1966, Daylight Saving Time was reintroduced in the United States.

Daylight saving time, also known as "daylight saving time" and "daylight saving time", is a system that artificially sets local time in order to save energy, and the uniform time used during the implementation of this system is called "daylight saving time".

Generally, in the summer when the morning is early, the time is artificially advanced by one hour, which can make people get up early and go to bed early, reduce the amount of lighting, so as to make full use of light resources, so as to save lighting electricity.

The specific rules of daylight saving time vary from country to country. Currently, nearly 110 countries around the world observe daylight saving time every year.

At present, the national energy shortage, power shortage, how to save energy, reasonable and good use of energy, has become an increasingly urgent topic. Therefore, it was suggested that the country should reinstate daylight saving time in order to ease tensions. However, some people believe that daylight saving time has a limited effect, but it will bring chaos to people's lives and should not be restored.

Someone has calculated an account: if China saves 1 kilowatt-hour of electricity per person per day due to the implementation of daylight saving time, then the daylight saving time system is 153 days, and each person can save 153 kilowatt-hours of electricity per year, and if 1 billion people in the country's 1.3 billion people can contribute to the actual participation in the implementation of daylight saving time, then the country can save 1 billion kilowatt-hours of electricity every day, and the country can save 153 billion kilowatt-hours of electricity every year. If each person can save 2 kilowatt-hours of electricity per day, then the whole country can save 2 billion kilowatt-hours of electricity every day, and the whole country can save 306 billion kilowatt-hours of electricity every year, which is equivalent to the annual power generation of the Three Gorges Dam (100 million kilowatt-hours of electricity)!

However, it turns out that daylight saving time is not an effective energy consummation, and due to the cost of adjusting the time, there are few benefits left from daylight saving time.

It has been argued that people's long-standing habits of time can be corrected and adjusted through legislative constraints. However, this is contrary to the original intent of legislation, which cannot and should not regulate people's lives per se, and which is harmful to health.

Save energy. "Daylight Saving Time" has a long history. In 1784, Franklin proposed the "daylight saving system"; In 1908, the Englishman Weller again proposed.

It was not until 1916 that Germany was the first to implement it, and Britain and the United States were not to be left behind. In 1942, during World War II, the United States restarted daylight saving time, and in 1966, it was formally legislated to establish permanent use. During the 1973-1975 oil crisis, the United States extended daylight saving time for two consecutive years to save oil.

It is understood that there are currently more than 70 countries and regions in the world that implement daylight saving time, and European countries have been using it for decades. The former Soviet Union is a vast country divided into 11 time zones, and daylight saving time was introduced as early as 1917, and it was included in the permanent system in 1981. Among the world's great powers, only China has not adopted it so far.

However, with the current energy shortage in China, it is necessary for China to adopt daylight saving time. According to statistics, daylight saving time can save the United States at least 10,000 barrels of oil per day for power generation. The result of the trial in New Zealand was electricity savings, while in France it was 4%.

The Chinese population is five times that of the United States, the energy waste rate is three times that of developed countries, and there are many remote areas or farmers who still use kerosene or candles for lighting, so the implementation of daylight saving time is conservatively estimated that China can save as much as 30,000 barrels of oil a day. In fact, in addition to household electricity, commercial and transportation can also be energy-saving. In fact, in April 1986, China's General Office issued the "Notice on the Implementation of Daylight Saving Time Nationwide", requiring the whole people to go to bed early and get up early to save energy.

However, this daylight saving time system was only implemented for 6 years and was discontinued in 1992, mainly because China has a vast territory in the east and west but only pursues one Beijing time, and the implementation of daylight saving time brings many unrealistic counter-effects. First, the implementation of a national time zone system, which divides the country into several time zones, each of which works according to the normal local time. Second, it is necessary to restore the implementation of daylight saving time, vigorously publicize the benefits and necessity of popularizing it, and not repeat the mistakes of the 80s of the last century. （

A failed little experiment.

China abolished daylight saving time.

Mainly based on the following three points:

1. China has a large east-west span but uses the same time, while the United States uses four different time zones from east to west. Eastern China.

The right time is too early for the west, and it is still dark in the west when the east is dawning, and the use of daylight saving time for the whole country cannot achieve energy conservation and emission reduction.

purpose. 2. There is a lot of room for daylight saving time in high latitudes, because the day and night time varies greatly in high latitudes, but China's economically developed areas are concentrated in the Yangtze River Delta.

and the Pearl River Delta and other relatively low latitude areas, the summer daylight hours are not so long, and there is not much room for implementation.

year, Qinshan Nuclear Power Plant.

The Daya Bay Nuclear Power Plant under construction was officially put into operation.

It will also be put into commercial operation in two years. At that time, the upgrading of technology and equipment of China's electric power enterprises began to bear fruit, and a number of hydropower stations were built.

April 1986, China**.

The relevant departments issued a "notice on the implementation of daylight saving time throughout the country", and the specific practice is as follows: Every year, from 2 o'clock in the morning on the first Sunday in mid-April, the clock is set forward by one hour, that is, the watch hand is dialed from 2 o'clock to 3 o'clock, and daylight saving time begins; At 2 a.m. on the first Sunday in mid-September, the clock is set back by one hour, i.e. from 2 a.m. to 1 a.m., and daylight saving time ends.

From 1986 to 1991, the first year of the six years was the first year of the daylight saving time, which began on May 4 and ended on September 14, the other years were implemented according to the prescribed time period. A few days before the start and end of daylight saving time, announcements from the relevant authorities are published in the news**.

To put it simply, daylight saving time is one hour faster than normal, and in order to save energy, the day is one hour longer, because the summer brightens early, there is an extra hour of activity in the morning, and you go to bed early at night! Daylight saving time is more controversial, China did not implement daylight saving time after 1992, and the role of covering ears and stealing bells during daylight saving time is not obvious.

Daylight saving time is one hour ahead of standard time. For example, during the implementation of daylight saving time, 10 a.m. in standard time becomes 11 a.m. in daylight saving time.

Daylight saving time is a system in which local time is artificially set in order to save energy, and the uniform time used during the implementation of this system is called "daylight saving time".

In the summer, because the sky is very early, in order to save energy and reduce activities at night, the time is advanced by an hour, so that all activities are advanced by an hour, and more use of the day...

Astephen Astephen Adolf bicycle V-shaped from the decoration for love and Astephen fell in love with the place of Assad big right and wrong.

Stephen Eros's arrow, Farak, has been on the scene for nearly two years, thinking about taking it out, the environment, loving my family's second-class garbage, falling in love, forging ahead, understanding; The Alaka-colored Ferrari began to pay the electricity bill, and the pepper water learned about the technological style of Olaf's driving.

There are two main reasons for cancellation:

First, China spans a large east-west direction, but China uses a unified time zone. The right time for the east is too early for the west. If you go to work before dawn, you will naturally not achieve the purpose of saving electricity.

Second, in high latitudes, the time of day and night varies greatly between winter and summer. If you enter the Arctic Circle, there will be "white nights" in summer and "dark days" in winter, so there is a lot of room for daylight saving time in summer, and daylight saving time can be implemented for half a year. Due to the low latitude of China's economically developed areas, the daylight hours in summer are not as long as those in high latitudes, and there is little room for the implementation of daylight saving time.

One or two months. No matter how long it takes, you have to turn on the lights when you wake up early, and it will be meaningless.

Because daylight saving time does not really achieve the purpose of saving energy and using solar energy.

Chinese farmers: We must be the ones who make the most of the energy of sunlight, and they point out the ills of daylight saving time in one sentence. For more than 30 years, when daylight saving time and winter time are at the turn of summer time and winter time every year, it must take one or two weeks or even longer to "reverse the jet lag" in order to adapt to the arrival of the "new time." From another point of view, it also reflects from the most fundamental angle that the system implemented by Western countries is not absolutely perfect and correct as described by the high-ranking Chinese.

In the eyes of many countries on the five continents of the world, European and American countries are developed and advanced countries that attach importance to science and technology, especially the United States. For example, in the past, Britain encouraged the cutting of the appendix of newborn babies, and babies born into British aristocratic families were absolutely not spared, and the encouragement of patients to cut off their tonsils due to throat inflammation is a similar example to the current practice of daylight saving time. As we all know, the appendix and tonsils are the alarm bells in the human body, without these two alarm bells to remind the patient to take medicine and injections, the doctor can not correctly grasp the patient's disease development, pathological condition, and so on when the patient's condition is serious, it is often already the time when the disease is terminal.

After years of clinical lessons, the doctor finally discovered that the appendix and tonsils must not be cut off when it is not the time to cut them, so they secretly decided not to encourage the circumcision of the baby's appendix and the patient's tonsils, without any public statement, and did not express sorry to the public. Perhaps on that day, American politicians suddenly had a whim, and daylight saving time suddenly disappeared overnight, just like Britain cut the appendix and tonsils, and never reappeared in the United States, and of course there would be no statement or admission of error.

Photography Basics: What does daylight saving time mean when setting the camera time? Caption.

Hello, used.

China began to implement daylight saving time in 1986, and during the summer time, Beijing time was changed to Beijing summer time, and the implementation was terminated in April 1992. So in the past, there was a time to report the time of "Beijing Daylight Time"!

It seems to have been around 1987.

During World War I, in order to save fuel, some countries stipulated that the unification time within their borders should be advanced by one hour or half an hour in the summer, and then revert to the original unification time in the winter. This advance time in the summer is called legal time or daylight saving time, and this method has been used in some countries and regions since then.

During the First World War, in order to save fuel, some stupid countries used laws to advance the unification time of their borders by one hour or half an hour in the summer, and in the winter, they returned to the original unified time. This time of advance in the summer is called legal time or daylight saving time. This approach has since been adopted by some countries and regions, such as the United Kingdom and some states in the United States.

On the last Sunday of October, daylight saving time ends in the United States and is changed to winter time.

Historically, France first followed the example of the United Kingdom in 1916 to implement winter time, which was abolished during World War II; After the first oil crisis, in order to save energy, in 1976, France reverted to winter time. The French side believes that France implements a dual time system in summer and winter, which can reduce the demand for lighting electricity by 4% every year.

According to the latest energy bill passed by the U.S. Congress, in order to enhance daylight conservation, daylight saving time has been extended since 2007, with the start date from the first Sunday in April to the second Sunday in March, and the end date from the last Sunday in October to the first Sunday in November. In other words, the winter time will be shortened by about one month. The reason why it is arranged on Sunday is to facilitate the adjustment of life so that it will not be greatly affected.

Why doesn't China use winter time?

Since 1986, at 2 o'clock in the morning (Beijing summer time) on the first Sunday in mid-September every year, the clock will be set back to one hour, which is winter time; From 2 a.m. (Beijing time) on the first Sunday in mid-April, the clock is set forward by one hour, which is daylight saving time. The dividing line is generally 1 May and 1 October.

The main reason for the abandonment was that the knowledge of the Chinese people at that time was relatively small, although there was only a half-hour time difference, but everyone would not calculate this summer time, and many people were not used to it, so there were things such as missing trains and planes. Whether it is workers or farmers, teachers or students, leaders or subordinates, they have not been able to adapt to the change of summer time and winter time, it is too troublesome, so after 6 years of implementation, it was decided to terminate the implementation.