It s 2011, why is there a 21st century? Isn t that the year 2100? And that s 80 years more?

The counting of the century begins a hundred years in advance. 1899 was the 19th century, and by 1900 it was the 20th century. Also by the year 2000, which is our current chronology, it will be the 21st century.

A century is defined as a continuous hundred years and ten years of shared digits. The year 2000 is the first two digits of the year +1:20+1=21.

The odd-numbered chronology comes from the post-Jesus era, where 1 year usually means "year of our lord", so the first century lasted from 1 to 100 AD, and the 20th century from 1901 to 2000 AD.

21st Century:

After the beginning of the 21st century in modern history, the United States became the world's only superpower, the Soviet Union collapsed at the end of the 20th century, and Russia inherited most of the Soviet legacy.

With the end of the Cold War and the rise and spread of terrorism around the world, the United States' desire for hegemony has become stronger and stronger, and some other countries or alliances of countries, such as China, Japan, the European Union, Russia, and India, have become important forces in promoting the multipolarization of the world.

Digital technology began to develop in the early 80s and 90s of the 20th century, and gradually became the mainstream of the 21st century, but many voices opposed the excessive use of mobile ** brought about by digital technology, and Internet-related technologies have also been subject to a lot of controversy.

Century refers to the unit in which the era is calculated. A century is a hundred years and usually refers to a continuous hundred years. When used to calculate days, the century usually begins with an era divisible by 100 or a year thereafter, such as 2000 or 2001.

This odd-numbered chronology comes from the post-Jesus era, where 1 year usually means "year of our lord", so the first century runs from 1 AD to 100 AD, and the 20th century runs from 1901 AD to 2000 AD, so 2001 is the first year of the 21st century. However, the first century has been set at 99 years AD, while the following centuries will be 100 years, and if this definition is followed, 2000 will be the first year of the twenty-first century. Century.

The main problem is that the calendar is different, calculated according to the Gregorian calendar. For example, 18 years how many years we are 19 actual. The year 123 A.D. is definitely the 1st century, and there can be no 0th century, and a century is 100 years.

From the first year of the Common Era to 100 years is the first century, and the 2000 to 2100 years is the 21st century.

A.D. 0 is the first century A.D., so 2000 plus one year is the 21st century.

After 100 years, it is the beginning of the first century.

Why is 2,000 years called the 21st century?

It's about to start, so saying like this is that the second aunt has four seasons and four seasons, which means that there are two swimsuits, this is this kind of world.

The first century is 100 years, and after the 20th century, isn't it the 21st century?

The year 2000 is the 20th century. The year 2000 is not counted as the 21st century, because the 20th century is from 1901 to 2000. Because there is no 0th century AD, it is counted from the 1st century AD, and similarly, there is no 0 AD, so it starts from 1st AD.

So the year 2000 belongs to the 20th century.

The social context of the 20th century

In the arts, popular culture, with the United States as its origin, became the most well-known thing. Especially through television, radio and film, almost all parts of the world have been influenced by it to a greater or lesser extent, and even regarded it as a symbol of progress, convenience and civilization. On the other hand, local cultures in various places also use these technologies** to spread in their own countries or neighboring regions, especially in Japan and France.

In addition, the 20th century was the most frequent moment in human history, with political asylum for the sake of labor demand.

With a better quality of life, a large number of Chinese have moved to North America and Southeast Asia.

Many Turks with North Africa.

Regional peoples migrated to Western Europe.

Quite a few Hispanics.

Entering the U.S. by legal or illegal means. These movements break with the geographical concept of ethnic divisions in the past, but they also create social problems within many industrialized countries.

The year 2000 was the last year of the twentieth century.

The year 2000 is the 20th century. The twenty-first century is generally considered to be the period from 1 January 2001 to 31 December 2100. However, it is also believed that it is from 1 January 2000 to 31 December 2099.

A century refers to the unit in which the era is calculated, and a century represents a hundred years, usually referring to a continuous hundred years and ten epochs with a shared digit. This odd number of chronology.

From the time of Jesus, the year 1 of them usually denotes the year of Our Lord.

International Universal Century Chronology:1st century 1-100 years, 0s-90s.

2nd century 101-200, 100s-190s.

20th century 1901-2000, 1900s-1990s.

21st century 2001-2100, 2000s-2090s.

Since the starting point of the A.D. era is 1 A.D., and the 0s-90s are the first century, the calculation of the binding digit age is carried out from the 0s. The 0s were a ten-year position, accounting for only 9 years. Concisely calculating the year from the 0s to the current 2020s, we live in two types: the number of digits and the centennial whole of the era.

It's 2019 and it belongs10 years of the 21st century.

Analysis: 10 years is an era, from the A.D. 1 line, every 10 years is divided into 10 years for a historical period, and 2019 A.D. is between 11 years and 20 years in the 21st century, so it is the 10 years of the 21st century.

1. Century division

The A.D. year is calculated from the first year of the A.D. (i.e., 1 A.D.), previously known as B.C., and is divided into a century every 100 years.

For example, the 1st century A.D. (i.e., the first 100 years) is the historical period of 1 A.D. and 100 A.D.;

In the 21st century A.D. (i.e., the twenty-first 100th year), it was 2001 A.D. and 3000 A.D.

2. Chronological division

1st century 10 AD: 1 AD 10 AD;

1st century 100s: 91 A.D. 100 A.D.;

10 years of the 20th century: 1901 1910;

90s of the 20th century: 1981 1990;

100 years of the 20th century: 1991 2000 AD.