Why do we use time zones?

Before we say why time zones are used, we need to explain what they are.

One time zone (zone) covers areas of the Earth that have chosen the same local time.

Local time is the mean solar time for a particular point on the Earth’s surface. It is determined by the apparent passage of the Sun over the meridian of that place. That is, that place is at that time looking at the Sun’s position over that place.

The expansion of transport and communication during the 19th century created the need for a unified time-keeping system, and time zones were presented to the public.

History of time

Before people used solar time, so the weather varied from stealing to hail, which created problems. With the advent of telecommunications and the expansion of the railways, the need for a universal time grew. They have partially solved this problem because they make all clocks in certain regions tuned to the same mean solar time.

The globe is divided into 24 zones, and each is 1 hour forward or backward from a particular location. Non-standard zones vary by half an hour. An agreement was reached in 1892 in Washington.

By agreement, the zone time is valid in one zone with a latitude of 15 °, and there are a total of 24.

The division of the Earth is made so that it starts from the zero meridians in Greenwich with 7.5 ° east and west.

For economic reasons, most countries move time forward or backward relative to the corresponding time. As a result, smaller states determine their time by the band in which most of the state is located.

As they were introduced, a date limit was introduced. Crossing that border changes the date. This line generally runs along the 180th meridian and does not go through populated areas to avoid problems in the functioning of society. By crossing that border from east to west (opposite to the direction of the Earth’s rotation), we come to the next on the calendar, and when we cross the border from west to east, then we repeat the day in the calendar, or two days we will keep the same date.

Time Zones

Among the countries in the Greenwich or meridian 0 are:

UTC +/-

Spain (Canary Islands)



Portugal (excluding the Azores)



UTC- 3:00



Chile (Chilean Antarctica and Magallanes region)



UTC- 6:00

Chile (Easter Island, Sala Island and Gómez)

Costa Rica

Ecuador (Galapagos Islands)

The savior



Mexico (wide variety of areas)

UTC- 9:00

United States (mainland Alaska)

France (French Polynesia)

UTC- 12:00

United States (Baker Islands, Howland Island)

UTC + 3:00

Saudi Arabia





UTC + 6:00


United Kingdom (British Indian Ocean Territory)

Russia (Omsk)

UTC + 9:00

North Korea


East Timor

UTC + 12:00

United States (Wake Islands)


New Zealand

How many time zones we have in USA?

The U.S. was divided into 4 time zones on November 18, 1883. And since 1967, the U.S. Department of Transportation (DOT) has been responsible for managing time zones in the country. In the modern USA, we have 9 time zones that are by law. However, by adding 2 uninhabitable time zones, Howland Island and Baker Island, we get to 11 time zones.

How many time zones are there in Russia?

Russia currently has 11 time zones across its vast territory that occupies one-ninth of the planet, and their leaders believe it is too many hours in a day. Dmitry Medvedev suggested that Russia reduce the number of time zones for a better economy of the country.

What time zone is in California?

California (USA) is located in a time zone called the Pacific Time Zone (UTC -8 / -7).

Western Time Zone

Western European Time (WET) is a time zone that covers parts of Western Europe and consists of countries that use UTC + -00: 00, also known as Greenwich Mean Time.

In the winter months, some Western European countries use UTC + -00: 00, namely: Portugal, the United Kingdom, the Faroe Islands, Northeast Greenland, and Iceland.

What time zone is CT

Central Time is also known as Central Standard Time (CST) and Central Daylight Time (CDT).

Central Time is the second outermost time zone in the United States and the third easternmost in Canada. Office One-third of the U.S. population lives in the CT time zone. It stretches from northern Canada to the south to Mexico near the Equator. In North America, the central weather divides the border with Eastern Time (ET) in the east and Mountain Time (MT) in the west.

What time zone is EST

Eastern Standard Time (EST) is 5 hours late for Coordinated Universal Time (UTC). This time zone is in use during standard time in North America, the Caribbean, and Central America.

EST is the easternmost time in the United States and the second easternmost in Canada.

It covers all or parts of 23 states in the US and three provinces or territories in Canada.

Nautical time

Nautical time refers to the systems by which ships are guided on the high seas and express their local time. This dates back 20 centuries as a standard marine irrigation system. And it is normally used only for overseas travel.

Nautical day

Before 1805, the Royal Navy used three days: nautical, civilian and astronomical. For example, a nautical day starts at noon and ends the next day at noon. Before 1920, all ships kept the sun on the high seas by setting the clocks at night or in the morning so that, given the speed and direction of the boat, it was 12 o’clock when the sun crossed the ship’s meridian.

When is the world going to end

Predictions of apocalyptic events that would cause the extinction of humanity, the collapse of civilization, or the destruction of the planet have been predicted since at least the beginning of the Common Era. CE is one of the annual calculations used by the Gregorian calendar to calculate time, the world’s most widely used calendar. Most predictions apply to the Abrahamic religion.

Christian predictions otherwise refer to events such as the rapture, the Last Judgment, and the second coming of Christ.

Rapture refers to an event in which all Christian believers who are alive and those who have died as believers will be resurrected and lifted into the clouds to meet the Lord in the clouds.

The Last Judgment is part of the Abrahamic religion, which is mentioned in the gospel of Matthew, also in Surah az-Zukhruf in the Holy Qur’an. The second coming of Jesus Christ (Islam: Isa Peace be upon him) will take place in this event, which is also the last sign before the Judgment by God.

Some people thought that the end of the world would come on January 1, 2000, and the reason for this is bizarre:

During and before 1999, there were widespread predictions of a Y2K computer bug that would crash many computers on midnight of January 1, 2000, and cause malfunctions leading to significant catastrophes worldwide, and that society would cease to function.

According to Messiah Foundation International, the following prediction that awaits us to see if it will come true will happen in 2026. This spiritual organization predicts that the world will end in 2026 when an asteroid collides with Earth.

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