What is the 21st century BC?

The 21st century BC refers to 2099 BC --- 2000 BC

China is the Shang Dynasty. The West is the period when the Minoan culture of Crete was produced in ancient Greece and the Middle Kingdom of ancient Egypt.

In the 21st century BC, Yu's son Qi destroyed the "Chan Rang" system, proclaimed himself king, and established the Xia Dynasty (about the 21st century BC - 16th century BC), from which China entered a slave society from a primitive society. Before that, China had been in a long period of primitive society, and it can be said that the 21st century BC was the dividing point between China's primitive society and slave society. At that time, it was not the Shang Dynasty, but the Xia Dynasty, which had just been established.

Xia (21st century BC, 16th century BC).

Shang (16th century B.C., 11th century B.C., Battle of Muye), Western Zhou (11th century B.C., 770 B.C.).

The people above fart indiscriminately.

In the 21st century BC and 2070 BC, China's first dynasty, the Xia Dynasty, was established.

Whereas, the Shang Dynasty was established between the 16th and 11th centuries BC.

The 21st century BC is from 2099 BC to 2001 BC.

I advise the upstairs not to talk nonsense, it will be very humiliating.

If you don't understand history and be a human being, don't mix it up, I said it's just that others don't know how to keep time.

BC and AC are better to say that; But what time does the 21st century B.C. refer to? "That is, 2099 BC--- 2000 BCE; That said, and until the exact chronology of the present year mentions it, the habit alone never says this. It is said that the Spring and Autumn Period, not to mention the Warring States Period, not to mention how many years BC it is.

China is the Shang Dynasty. The West is the period when the Minoan culture of Crete in ancient Greece was born.

Wrong, the 21st century is from 2001 to 2100, I think the 21st century BC should be from 2100 BC --- 2001 BC

The year 202 BC was the end of the 3rd century BC.

The formula for converting the specific year to the century is 1 in thousands of digits, and the number of tens remains unchanged. The lower the value of the tens and single digits of the BC, the later the date, 202 BC is the end of the third century BC.

The algorithm of the Common Era is that there is neither a 0 BC nor a 0 AD statement. The year after 1 B.C.E. was 1 C.E. On the other hand, the year before 1 C.E. is 1 B.C.E.

Chinese Chronicle: Establishment of the Western Han Dynasty

In 202 BC, the Western Han Dynasty was established.

Western Han Dynasty (202 BC 8 AD), the Western Han Dynasty was the first period of the Han Dynasty, from 207 BC to 25 AD. In the Han Dynasty, the Western Han Dynasty was a strong period, from the reign of Wenjing to the generation of heroes of Emperor Wu of the Han Dynasty, the political, economic and cultural development reached a peak.

Although the Western Han Dynasty replaced the Qin Dynasty, the various systems were basically inherited by the Qin Dynasty, but the major policies were changed, and the Qin Dynasty learned lessons from the fact that the Qin Dynasty was harsh and died quickly, and changed to recuperate, and the taxes during the period of Emperor Wen and Emperor Jing were also reduced to 15 taxes and 30 taxes, which laid a solid material foundation for the later strength of Emperor Wu of the Han Dynasty. During this period, the rule of law also became more civilized, and torture began to be abolished.

The year 2070 BC belongs to the late 21st century BC. A.D. is a chronology.

The so-called 2018 A.D. is two thousand and eighteen years from the first year of A.D., and 2018 B.C. means two thousand and eighteen years before 1 B.C.

The year after 1 B.C.E. was the year 1 A.D. (i.e., 1 A.D.). For example, the Western Han Dynasty established Naihe Raid 202 BC is later than the Qin Dynasty established in 221 BC, but the specific month of each year, it is still counted, January is in front, December is behind, and the date is the same, the first day of the new year is in front, and the fifteenth is in the back.

Century refers to the unit of calculating the era, one century represents one hundred years, and shed zen usually refers to a continuous hundred years and ten years of shared digits.

This odd-numbered chronology comes from the post-Jesus era, where 1 year usually means "yearofourlord," so the first century runs from 1 to 100 AD, and the 20th century runs from 1901 to 2000 AD.

1. Early period: generally refers to the first thirty years of a century.

2. Middle period: Generally refers to the middle forty years of a century.

3. Late period: generally refers to the last thirty years of a century.

202 BC is the 2nd century.

The word "century", ** in Latin, means 100 years, which also begins in the year of Jesus' birth, i.e., in the first year of the Common Era.

There is no 0 BC or 0 AD, and the year after 1 BC is the first year of AD (i.e., 1 AD). Although the BC years are counted backwards, the later numbers are smaller than the earlier ones.

When used to calculate days, the century usually begins with an era divisible by 100 or a year thereafter, such as 2000 or 2001. However, the first century C.E. is set at 99 years, while the following centuries are 100 years, and 2001 is the first year of the twenty-first century if this definition is followed.

Algorithm: The Gregorian calendar is roughly the same as the Julian calendar, but the Gregorian calendar specifically stipulates that all centuries (divisible by 100) have no leap day unless they are divisible by 400; Thus, every 400 years, the Gregorian calendar has only 97 leap years, three leap years less than the Julian calendar. The average length of the calendar year in the Gregorian calendar is days, which is close to the day of the mean return year, i.e., about one day of error every 3,300 years, and closer to the day of the return year of the vernal equinox, i.e., about one day of error every 8,000 years.

The Julian calendar, on the other hand, has a calendar year of days, which is about one day wrong every 128 years. By 1582, the date of the vernal equinox (March 21) in the Julian calendar was 10 days apart from the actual time of the Earth's revolution to the equinox. Thus, when the Gregorian calendar was introduced, the day after Thursday, October 4, 1582 in the Julian calendar was changed to Friday, October 15, 1582 in the Julian calendar, i.e. 10 days were deleted, but the original cycle of the week remained the same.

The 2nd century A.D. refers to the period from 101 A.D. to 200 A.D. 2 BC, a common year in the Gregorian calendar, with a total of 365 days, 52 weeks and 1 day; Among them, February 16, 3 B.C. February 4, 2 B.C. is the year of the horse, February 5, 2 B.C. February 23, 1 B.C. is the year of the goat, and the leap winter month of the year; The first year of Yuanshou.

Eastern Han Dynasty (25 A.D. - 220 A.D.).

Eastern Fu Rebellion Zhou 770-256 BC.

Spring and Autumn Period. 770 B.C.-476 B.C.

Warring States period. 475 BC - 221 BC.

221-206 BC.

Han Western Han 206 BC - 23 AD.