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What is the time difference between China and the United States?

China's daylight saving time is faster than that of the United States 12 hours; The winter time in China is faster than that in the United States 13 hours.

The local time in Beijing, the capital of China, is 2065438+September 23rd, 2008 18: 19: 17, which is the time of the East Eighth District. The local time in Washington, D.C. is 06: 19:28 on September 23rd, 2008, and it's daylight saving time.

Because the territory of the United States spans multiple time zones, there is no standard time. So the problem of time difference between China and the United States is more complicated.

The so-called time difference between China and the United States generally refers to the time difference between Beijing time and eastern time or western time. We already know that the time zones of China and Beijing are East Eight Districts, while the United States adopts daylight saving time and winter time.

Namely, daylight saving time and winter time. In the United States, the time difference between China and the eastern United States is 12 hours under daylight saving time, while in winter time, the time difference between China and the eastern United States is 13 hours.

Beijing time = American time+time difference (because Beijing time is earlier than American time)

American winter time

Sino-American standard time difference, that is, the time difference between American standard time and Beijing time;

1, Eastern Time:-13

2. Central Time:-14

3. Mountain time:-15

4. Pacific Time:-16

5. Alaska-Hawaii time:-17,-18.

American daylight saving time

Daylight saving time difference between China and the United States, that is, the time difference between American Daylight Saving Time and Beijing Time: (Daylight Saving Time is one hour earlier than standard time)

1, Eastern Time:-12

2. Central Time:-13

3. Mountain time:-14

4. Pacific Time:-15

5. Alaska-Hawaii time:-16,-17.

The time difference between China and the United States in the extended data generally refers to the time difference between Beijing time and US Eastern Time or Western Time. The United States implements daylight saving time, and Beijing time is just 12 hours earlier than the eastern United States (E.T. for short). In non-daylight saving time, Beijing time is earlier than Eastern Time 13 hours. Therefore, the time difference between China and America can be divided into standard time difference between China and America and daylight saving time difference between China and America. Because there is only one time standard in China, which is Beijing time.

In fact, Beijing time is not the local average solar time in Beijing (1 16.4 E), but the local average solar time 120 E, with a difference of about 16 minutes.

Beijing time was not even determined in Beijing, but was told by nine cesium atomic clocks and two hydrogen maser groups of the National Time Service Center of the Chinese Academy of Sciences in Lintong, Shaanxi, through precise comparison and calculation, and was compared with time service departments around the world in real time through satellites.

The United States adopts the summer and winter dual-time system, one is daylight saving time and the other is winter time (that is, standard time). Daylight saving time is one hour earlier than standard time. The United States began to modify the season in 2007, with daylight saving time on the second Sunday of March and winter time on the first Sunday of 1 1 month. Arizona, Indiana and Hawaii do not use daylight saving time.

From the east coast to the west coast, the United States spans from West Zone 5 to West 10, with six time zones.

1. Eastern Time-Eastern Time (ET) (time in the fifth district of the west) Washington, D.C., new york, Boston, Atlanta, Philadelphia, Miami, etc. All in this time zone.

Second, Central Time-Central Time (CT) (West Sixth District Time)? Chicago, St. Louis, New Orleans and Houston are all in this time zone.

3. Mountain Time-Mountain Time (mt) (West Seventh District Time)? Denver, Phoenix and Salt Lake City are all in this time zone.

4. Pacific Time-Pacific Time Zone (PST) (west eight time) Los Angeles, San Francisco, San Diego, Las Vegas and Seattle are all in this time zone.

5. Alaska-Hawaii Time-Alaska-Hawaii Time (West 9th District Time and West 10th District Time) Alaska and Hawaii are in this time zone.

References:

Time difference between China and America-Baidu Encyclopedia