Lunar calendar, formerly known as summer calendar, lunar calendar and old calendar, is one of the traditional calendars in East Asia. The lunar calendar belongs to a kind of lunar calendar, and an average calendar month is equal to a new moon. However, the leap month is set to make the average calendar year a tropic year, and the 24 solar terms are set to reflect the changing characteristics of the seasons (the annual movement of the direct point of the sun), so there is also a solar calendar.

Today, almost all Chinese in the world, as well as countries such as North Korea, South Korea, Vietnam and early Japan still use the lunar calendar to calculate traditional festivals such as Spring Festival, Mid-Autumn Festival and Dragon Boat Festival.

From the era of ancient cadres and branches to the opening of the calendar (Gregorian calendar) in the late Qing Dynasty, it was revised many times in history. In the history of China, more than 65,438+002 calendars have been produced, which have had a great influence on the culture and civilization of China, such as the official calendar (photo), the Xia calendar, the Shang calendar (lunar calendar), the Zhou calendar, the taichu calendar calendar in the Western Han Dynasty, the San Tong calendar and the imperial calendar in the Sui Dynasty.

Advantages of the lunar calendar

1, the lunar calendar belongs to the lunar calendar, taking into account the relationship between the sun, the moon and the earth. Lunar calendar is a fixed calendar, with the characteristics of astronomical calendar, which can well correspond to various astronomical phenomena, such as its solar terms strictly correspond to the height of the sun, calendar days strictly correspond to the phase of the moon, the frequency of non-appearance and appearance of leap months corresponds to the perihelion and distant sun of the earth, and other astronomical phenomena such as sunrise and sunset. Dawn, five-star orientation, solar eclipse, tide, etc. Even calendar months roughly correspond to the height of the sun.

2. The lunar calendar only has 29 days and 30 days, and it is stipulated by the fixed date of the new moon, so the human factor is small and it is not easy to change it at will.

3. The beginning of a year has a strong astronomical significance, and it has the astronomical significance of the year of the sun and the moon.

4. The lunar calendar can best reflect the traditional culture of the Han nationality, that is, the harmony between man and nature and the birth of yin and yang.