How to calculate district time, how to calculate local time, district time??

1.The sum of one Eastern Time Zone and one Western Time Zone:

For example, the time difference between the East 5th District and the West 5th District is 5+5 10 (hours), and the time difference between the East 8th District and the West 8th District is 8+8 16 (hours) 2Subtraction of two eastern or two western time zones: the larger one decreases.

For example, the time difference between the East 5th District and the East 8th District is 8 5 3 (hours), and the time difference between the West 5th District and the West 8th District is 8 5 3 (hours).

Time zone vs. East or West time zone calculations: Use either of the above two methods.

Counting on the time zone chart is also OK:

You can only count in the direction of the 180-degree meridian (the international date line): the number counted is the time difference between the two places.

The difference between the East 8th District and the West 8th District is 9 because you separate the East 12th District from the West 12th District, in fact, they are a time zone, called the East and West 12th District; Even if you count 8 hours, it's wrong because the number is in the wrong direction.

However, the time difference between the east and west districts should be calculated separately

The time difference between the East 12th District and the West 12th District is 12+12 (24 hours, i.e. one day), so when crossing the International Date Change Line: the date will be reduced by one day when entering the West 12th District from the East 12th District to the east;

When entering the East 12th District from the West 12th District to the west, the date will be added by one day.

When the world is divided into 24 zones, every 15 degrees is a zone time, and the time of this zone is the time of the middle meridian in this zone time, from 0 degrees to the west is the west 1 west 2 west 3 zones, with the west longitude increasing, to the east is the east 1 east 2 zone, with the east longitude increasing. The 0 degree meridian is the 0 time zone, London is at the 0 degree meridian, which is the 0 time zone, Beijing is 116 degrees east longitude, and it is counted as the 8th zone in the east, that is, when London is 1 o'clock in the morning, Beijing is 9 o'clock in the morning...

First of all, find 2 locations, and the time is relative.

15* degrees of longitude is 1 hour.

Beijing is 120* east longitude, and Tokyo is 135* east longitude, which is an hour apart.

Or keep track of the time zone, for example, New York is the West 5th District, Beijing is the East 8th District, there is a difference of 13 hours (East plus West minus, just like the number axis) 0 in the middle, East is positive and West is negative.

Time to find place: time to find place Time to know place 4 minutes degree Longitude difference (east plus west minus) (the place sought is in the east, the "+" sign is taken, and the "-" sign is taken otherwise).

Zone time: Calculation formula: the time of the region = the time of the known zone The time zone difference (east plus west minus) The time when each time zone uses the same meridian of the time zone ** is called the time used by the whole region. The time is early in the east and late in the west. The difference in time between the two adjacent time zones is 1 hour.

In principle, the boundaries of time zones are divided according to geographical meridians, but in specific implementation, in order to facilitate use, they are often determined according to the political boundaries or natural boundaries of each country. Most countries around the world use standard time in time zones, which is a full hour away from Greenwich Mean Time. However, some countries still use the local time of their capital (or moderate location) as their national uniform time.

1. Find the time zone: The number of time zones has been.

Know longitude 15° (quotient is rounded to an integer, that is, the number of time zones) 2. When to find the zone: When the area is sought The time of the known zone The time difference of the time zone (east plus west minus) 3. Time to find the place: The time of the place to be sought The time of the known place is 4 minutes The degree of longitude difference (east plus west minus) 1 Local time Concept:

Moments that vary depending on longitude Cause: The earth rotates from west to east, making the easterly location of the same latitude early. Longitude is every 15 and local time is 1 hour.

Calculation formula: The local time sought = the local time known (the difference in longitude) 4 minutes (the requested place is in the east, the "+" sign is taken, and the "-" sign is taken otherwise) 2 Time zone and zone time Time zone: Theoretically, the world is divided into 24 time zones, and every 15 degrees of longitude is divided into a time zone.

Zone time: When each time zone uses the same meridian of the time zone, it is called zone time. The time is early in the east and late in the west.

The difference in time between the two adjacent time zones is 1 hour. Calculation formula: Time in the region = time in the known zone Time zone difference (east plus west minus).

6. How to calculate the area time:

Step 1: Determine the current one"Beijing Time".

Step 2: Find out the time zone in which the city is located.

Step 3: Calculate the time zone difference between Beijing and each city.

Step 4: Use the time zone difference according to the principle of east morning and west evening (east plus west minus).

Calculate the time of calculating the districts of each city with high skil.

Practice it. It is known that the time of London is 2 o'clock on Sunday, please.

Calculate the district time and day of the week for the following places: Beijing, New York, Moscow, Los Angeles, Cairo, Sydney.

Time zone of London: Central; Time Zone of Beijing:

East 8th District. Time zone difference between Beijing and London:

Eight time zones. According to"East plus West minus", when you get the Qila District of Beijing:

2 + 8 = 10 (points).

Sunday. London time is 2 p.m. on Sundays.

New York: Saturday 9 p.m.

Moscow: Sunday at 5 a.m.

Los Angeles: Saturday at 6 p.m.

Cairo: Sunday at 4 a.m.

Sydney: Sunday at 12pm.

Local time:

1. Different meridians have different times - local time, the same meridian local time is the same.

2. Every 15 degrees in the world, the local time difference is one hour. Every 1 degree for 4 minutes.

3. There are countless places in the world.

4. Time of the requested place = time of known place The difference in longitude is 4 minutes. East plus West minus

5. The longitude difference is 15°, and the time difference is 1 hour; The difference in longitude is 1°, and the difference in time is 4 minutes (east plus west minus, east morning and west evening); The longitude is the same, the local time is the same; The longitude is different, and the local time is different.

Zone time: 1. The number of time zones = the longitude of the location 15, and the obtained quotient is rounded to an integer, which is the number of time zones.

2. The time of the sought area = the time of the known area Time zone difference l hour (the time zone of the sought area is located on the east side of the time zone of the known area, take "+" if it is located on the west side, then take "-" that is, east" + "west" -".

3. If the time is 24 hours, the time is the difference between the time minus 24, and the date should be added by 1 day; If the time sought is negative, the time is the sum of the time and 24, and the date is subtracted by 1 day.

Earth in the Universe – Local Time, Time Zone, and Zone Time Calculation.

There are three ways to calculate it:

1.Half-zone timekeeping method: according to the range of longitude spanned by the country, the place where the boundary longitude of the time zone that is different from the ** meridian is used. For example, India has adopted the Eastern Zone.

2.Eastern Time Zone Timekeeping Method: In order to make full use of solar illumination, some countries use the local time of the ** meridian in their eastern time zone. For example, when the DPRK is located between the East 8 and East 9 zones, but the East 9 zone is used.

3.Unified time timekeeping method: Although some countries have a large territorial span, they use a time for the convenience of communication.

For example, China's territory spans five time zones from 73°E (East 5) to 135°E (East 9) at the westernmost point, and "Beijing Time" has been adopted in order to facilitate the communication and coordination of different regionsBeijing time refers to the district time of the East Eighth Draft Wheel District, where Beijing is located, that is, the time of 120°E, not the time of 116°E, where Beijing is located.