How is daylight saving time changed, and what does daylight saving time mean

Daylight saving time in China begins on May 1 and ends on September 30 every year. But it has been abolished.

History of Daylight Saving Time in China. In the history of our country, daylight saving time was also practiced at one time. In April 1986, the General Office of the People's Republic of China 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.

So at present, there is no daylight saving time in China, the working hours of various organs and units across the country are adjusted according to the season, generally in summer from May 1 to September 30, the summer working hours are 8:00-12:00 in the morning, 3:00 in the afternoon

00—6：00；In winter, the working time is from 8:00 a.m. to 12:00 p.m

00, 2:30-5:30 p.m.

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".

Also known as daylight saving time, it is also known as "daylight saving time" and "daylight saving time". Generally, in the summer when the morning is early, the time is artificially adjusted by one hour, which can make people get up early and go to bed early, reduce the amount of lighting, make full use of light resources, and save lighting electricity. The specific rules of daylight saving time vary from country to country.

Nearly 110 countries around the world observe daylight saving time every year.

The specific method is: every year, from 2 o'clock in the morning (Beijing time) on the first Sunday in mid-April, let the eggplant, set the clock forward by one hour, that is, dial the watch hand from 2 o'clock to 3 o'clock, and start daylight saving time; At 2 a.m. (Beijing Daylight Saving Time) on the first Sunday in mid-September, the clock is set back to one hour, that is, the watch hand is set from 2 a.m. to 1 p.m., and daylight saving time ends.

Pros and cons of using daylight saving time:

1. Advantages: 1. The sun rises in summer at high latitudes is significantly earlier than in winter, and daylight saving time does play a role in saving lighting time.

2. Workers who are debugging time to adapt to daylight saving time.

3. Many retailers have a positive attitude towards daylight saving time. Confectionery conglomerates in the U.S. have lobbied the U.S. Congress to extend daylight saving time to November, as Halloween is the peak season for candy sales, and parents don't want their children to wander outside after dark.

5. Some people think that daylight saving time is very good for people with night blindness. Defibrillation saves electricity and allows people to develop a good habit of going to bed early and getting up early.

2. Disadvantages: 1. For low-latitude areas, daylight saving time has little effect. In particular, these places are very hot and humid in the summer, and when the night falls, it is too hot to sleep, and the early morning is a good time to sleep.

2. When daylight saving time starts and ends, people must speed up or slow down all the timing instruments; When daylight saving time ends, certain times occur twice on the day, which can easily create confusion. And it affects the timing of the flight.

3. Daylight saving time violates the original intention of setting the time zone Try to make noon close to the time of the sun in the middle of the sky.

Explanation of Daylight Saving Time.

Word decomposition Interpretation of summer 夏 à second quarter of the year: summer. Summer.

Mock Sparrow Wood Summer. Summer. Summer ripening.

Summer grain. China Dynasty name: Xia Dynasty.

Summer calendar. Refers to China: Huaxia.

Surname. Winter Shoudan or: 夂; Explanation of the time system

Refers to the season and system. "Poems, Wind, and Prescription Preface": "Duke Wen migrated to Chuqiu, built a city and camped a palace, and the people said that the country was rich and rich.

Kong Yingda Shu: "Not only can you get the season, but you also have the system." ”.

Refers to the system at the time. Qing Chen Tianhua "Chinese Revolution.

Daylight saving time, also known as "daylight saving time" and "daylight saving time", the uniform time used during the implementation of this system is called "daylight saving time". In summer, the morning usually comes early, and the time is artificially advanced by one hour. The specific rules of daylight saving time vary from country to country.