In the early days, the concept of the Millennium mainly came from Jews' expectation of the end of the world, which usually implied that the time for Christians to spread their fame in the world was coming.

The doctrine of the Millennium is clearly stated in Chapter 20 of the New Testament Revelation: the Millennium is the promise that Christ will come again, Satan will be sent to hell, the martyrs will be resurrected, and they will rule together with Christ for thousands of years. At the end of this millennium, Satan will make trouble again, but in the end, he will fail completely. Then all the dead will gather together for the final judgment.

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Mankind has entered 2 1 century, but the simple question of when 2 1 century will start is still being debated all over the world. From a scientific point of view, one school thinks that 2 1 century and the new millennium began at 200 1, while the other school thinks that 2000 is the first year of 2 1 century and the new millennium from the perspective of people's habits.

The fundamental reason for this confusion is that the internationally recognized Gregorian calendar year is 1 the Christian calendar year proposed 400 years ago, and its starting point is1. The year before 1 is defined as BC 1, and there is no year 0.

1626 In order to divide the time series into smaller years, the century is 1- 100, and the 2nd century is 10 1-200. Therefore, the second century began with 10 1, and the second one began with 10001. By analogy, 2000 should be the last year of the 20th century, the second 1000.

The absence of AD 0 brought great inconvenience to the study of history and astronomy. Some people often use one year to calculate the time span between BC and AD, without considering the fact that there is no year in AD ... For the convenience of calculation, the astronomical community records 1 year as+1 year, BC 1 year as 0 year, and BC 2 as-1 year. This is the astronomical chronology.

The fact that there is no year in AD 0 is often overlooked. Li Jing of Beijing Observatory once wrote that 1989, China solemnly commemorated the 2540th anniversary of Confucius' birth. Confucius was born in 55 BC1year, and 1989 should be the 2539th anniversary. 1April 1995, Beijing celebrated its 3040th anniversary. According to historical records, Zhou Wuwang named Zhao Gong Yu Yan in 1 1.

According to textual research, it is BC 1045. So from BC 1045 to AD 1995, it can only be 3039, not 3040. The 3040th anniversary of Beijing's founding capital also ignored the common sense that there is no year in A.D. and advanced the celebration by one year.

Baidu Encyclopedia-Millennium