Why times are different in countries around the world 5

Khan The speed at which the earth revolves and the time it takes for the sun to rise and set. Let's say China is now 9 o'clock. United States.

It's 9 p.m. in New York. The time difference is not the same. The moon and the sun also rotate in different directions. If it's the same. It's early for the earth. Ecological imbalance.

It's very simple: the earth rotates, so the distance and angle between each country on the earth and the sun are different, so it is the most clear!

The earth rotates, so the distance and angle between the countries on the earth and the sun are different.

Ethnicity and geography are different! At that time, it was different, and the earth was moving.

Because the earth revolves around the sun, if you use a calendar to keep track of the time, the time at which the sun is seen varies from country to country.

The time zone is different, the earth is so big, it will be chaotic at the same time.

Because the time standards used vary from place to place, there will be time differences relative to other regions.

The earth is turning, day and night, everywhere is not at the same time.

The time is the same.

The time (i.e., what is shown on the clock) is of course different.

Because of the latitude, it is not the same as the length of the rotation time, so of course the time.

The movement of the earth changes the time difference.

Because the earth rotates from west to east.

<>1. Mongolia.

Most of the country).

2. Malaysia.

Malaysia Standard Time.

3. Philippines Philippine Standard Time.

4. Singapore Singapore Standard Time.

5. Taiwan, China.

Taiwan Standard Time.

6. Indonesia (the whole region, effective from October 28, 2012) 7. Brunei. 8. Australia.

In order to overcome the confusion of time, an International Longitude Conference (also known as the International Meridian Conference) held in Washington, D.C., in 1884, stipulated that the world be divided into 24 time zones. They are the middle time zone (zero time zone), East 1-12 zones, and West 1-12 zones. Each time zone spans 15 degrees of longitude and the time is exactly 1 hour.

Finally, the 12th East and West Districts each span longitude degrees, bounded by 180 degrees east and west longitude. The time on the **meridian of each time zone is the time uniformly adopted in this time zone, which is called zone time. There is a 1-hour difference in time between two adjacent time zones.

For example, the time in the East 8 Zone of China is always 1 hour faster than the time in the East 7 Zone of Thailand, and 1 hour slower than the time in the East 9 Zone of Japan. Therefore, people who travel abroad must adjust their watches at all times to match the local time. Whenever you go west, you must move your watch forward by 1 hour for each time zone you pass (e.g. from 2 o'clock to 1 o'clock); Whenever you go east, you have to set your watch back by 1 hour (e.g. 1 o'clock to 2 o'clock) for each time zone you pass.

The time in each country is artificially set.

All parts of the world divide the day into 24 hours, and all of them regard the time when the sun is in the right time as noon, which is 12 o'clock. However, since the Earth is a sphere and is still rotating, there is a sequence of times when the sun reaches the right space. The western ones are later than the eastern ones because the earth turns from west to east.

In order to avoid confusion in the exchange of time between people around the world, various countries have reached synchronicity and divided the world into different time zones. The same noon time is generally used in the same time zone. The time zones are one hour apart.

When you talk about the time, you have to indicate which time zone it is. This avoids confusion. Of course, the standard time of a region does not necessarily apply to that region.

Instead, the time of the big city or capital of the country to which the region belongs is used. For example, although China has crossed 5 time zones, the whole country uses Beijing's East 8th District time. Of course, the time in different places can be converted according to the time zone.

To put it simply, the reason why the time of each country is different is mainly because the earth is revolving around the sun, so in the process of this rotation, that is to say, the time when we shine on the sun in each place is different, there is a sequence, and we divide the time according to the rise and fall of the sun, so it leads to a different time in each place, especially for the country, because the area of the country is generally larger, so the time when the sun rises and sets will often be different, then it will cause the time difference between that place and other places.

Because the earth rotates from west to east while revolving around the sun, the time of sunrise and sunset is inconsistent in various parts of the earth, so the whole world cannot use the same time. Scientists divide the world into 24 time zones, each using the same time, with adjacent time zones one hour apart. Some countries use the time zone in the time zone where the capital is located in their own country for convenience.

With the transformation of the sun, when our angels are bright, the result is that it is dark, when our angels are bright.

As the sun changes, when we are at dawn, it is dark in other countries. When we are dark, other countries are dawn.

Because the local time is different in each region, that is, the time standard is different. For example: China +8.

The Earth rotates, and the time in the east is earlier than the time in the west.

Because the time it takes for the sun to turn to each place is different.

So this distance is divided by the speed of the Earth's rotation.

Because of the rotation and revolution, it is thought that there is only one sun.

Dates vary from country to country in the world, and are divided according to the date line.

All over the world use the position of the sun as they see it as the standard for determining the "day", and a meridian on the other side of the earth in their own place is called the "date line", also known as the international date line, so that there are many "date lines", which are very difficult to use.

In order to solve this problem, a "date line" that is common and comparable throughout the world should be established. With the establishment of the zone time system of standard time timekeeping, the east and west twelve zones overlapped, the time was the same but the date was different, in order to avoid confusion, the 180° meridian was recognized as the date change line, because it was the date change line based on "Greenwich Mean Time". This "date line" is called the "international date line".

On 29 December 2011, Samoa and Tokelau adjusted their time zones from east to west of the International Date Line. As a result of the change, the two countries lost December 30 (Friday) and went directly from December 29 (Thursday) to December 31 (Saturday). The purpose of the change is to strengthen economic exchanges with Australia, New Zealand and Asia, keeping pace with these regions.

Answer. Time difference.

Time lag

Time Difference Simply put, the difference between local time in two regions is called time difference.

Local time: With the rotation of the earth, the sun rises in the east and sets in the west during the day, and the sun passes through the highest point in the sky of a certain place at 12 o'clock in the local time of this place, so there are different places on different meridians. The same time used within the adjacent 15 degrees of meridian is zone time (local time on the **meridian of the region) and the same time used worldwide is universal time (local time of the 0 degree meridian).

The longitude varies by one hour every 15 degrees in regional time and every 4 minutes in local time and longitude every 1 degree.

The standard time for all locations is Greenwich Mean Time (plus ( + or minus ( - time difference for the number of hours and minutes marked in the time zone. Many countries also use daylight saving time (DST), such as the United States, which runs from April to September, an hour earlier.

The calculation method of time difference: the subtraction of the standard time (the number of real-time zones) of the two time zones is that the time difference is pure sparrow, and the time when the value of the time zone is larger is earlier. For example, China is the East 8th Zone (+8), and the East of the United States is the West 5th Zone (-5), the time difference between the two places is 13 hours, and Beijing is 13 hours earlier than New York; If it is a period when daylight saving time is implemented in the United States, the difference is 12 hours.

I'll tell you.

The predecessor of the solar system was a dense cloud, driven by a certain force, which caused it to attract each other earlier, and this accretion process made the density gradually larger, which accelerated the accretion process. On the one hand, the centripetal accretion accumulation becomes the sun, and on the other hand, the gas gradually develops into a flattened shape, and in the process of development, the potential energy becomes kinetic energy, and finally the whole thing turns. At the beginning of the turn, there are those who turn this way and those who turn that, and after a certain direction prevails, they all become one direction, and this direction is now discovered as the right-hand rule.

The energy of the earth's rotation** is caused by the eventual transformation of material potential energy into kinetic energy, which is ultimately the earth's rotation on the one hand and rotation on the other. , and the earth is round, so the various parts of the earth are close to the sun.

Depending on the location, the time of the sun rises will be different, and there will be a time difference.

Standard time is Greenwich Mean Time. In 1884, the International Meridian Conference held in Washington, D.C., decided to adopt the meridian where the Greenwich Observatory (former site) of the British Greenwich Observatory (former site) is located as the starting point of the world time zone, and so on in other regions, so as to achieve the unity of time in the world.

To determine time, there are two systems of measuring time in the world: "universal time", which is based on the rotation of the earth, and "atomic time", which is based on the period of atomic oscillation. But because the two time scales measure seconds differently, differences between the two time systems will occur over time, hence the concept of "coordinated universal time".

The accuracy of UTC is nanoseconds per day, while the accuracy of UTC is milliseconds per day. So there is a compromise called Coordinated Universal Time, which came out in 1972. To ensure that UTC does not differ more than a second from UTC, a plus or minus leap second is added to UTC if necessary.

As a result, there will be a number of integer seconds of difference between UTC and international atomic time. The International Earth Rotation Agency** in Paris is responsible for deciding when to join leap seconds. Generally, the adjustment will be made at the last second on June 30 and December 31 every year.

To put it simply, the reason why the time of each country is different is mainly because the earth is revolving around the sun, so in the process of this rotation, that is to say, the time when each place of the former Lu Na shines on the sun is different, there is a sequence, and we divide the time according to the rise and fall of the sun, so it leads to a different time in each place, especially for the country, because the area of the country is generally larger. Therefore, the time when the sun rises and sets will often be different, so it will cause the time of that place to be different from the time of the other places.