What is the lunar calendar and what is the lunar calendar?

Lunar calendar is a traditional calendar in China, and it is also called lunar calendar, Chinese calendar, summer calendar, Han calendar and Chinese calendar.

The lunar calendar is not a simple lunar calendar, but a combination of yin and yang. Take the change period of the moon phase as the length of the month, add the "24 solar terms" component of the trunk calendar, and refer to the length of the tropical year of the sun as the year. By setting leap months, the average calendar year can adapt to the tropic year.

The lunar calendar is a calendar based on the lunar calendar (summer calendar) and integrating the solar calendar. Therefore, strictly speaking, the lunar calendar in China should not be called the lunar calendar, but the combined calendar of yin and yang.

In astronomy, the lunar calendar mainly refers to the calendar arranged according to the moon phase cycle, in which the moon orbits the earth once (based on the sun, the actual moon orbits more than once). ) is January, that is, the calendar based on the moon, with twelve calendar months in a year.

In the process of calendar development and evolution, the emergence of 24 solar terms was used to scientifically guide agricultural production, and the lunar calendar (Han calendar) was formed. Although the lunar calendar and lunar calendar are commonly known as ancient calendar, Han calendar, summer calendar and old calendar, there are still differences between lunar calendar and lunar calendar (Han calendar). The traditional summer calendar (Han calendar) is actually a kind of yin-yang calendar.

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The relationship between lunar calendar and lunar calendar

The lunar calendar is based on the lunar calendar (summer calendar), combined with the components of the solar calendar, absorbing the 24 solar terms of the solar calendar as a supplement, and adjusting it to the tropic year through the leap method. Because it absorbs the 24 solar terms in the calendar, it can reflect the changes of seasons and guide agriculture and other things. Therefore, the lunar calendar has both lunar and solar elements.

The lunar calendar is a combination of yin and yang, which refers to a calendar that takes into account the relationship between the sun, the moon and the earth. The lunar calendar does not consider the movement of the earth around the sun, so the changes of the four seasons have no fixed time in the lunar calendar and cannot reflect the seasons. Unlike the Gregorian calendar, which is fixed at 365 days or 366 days, the Gregorian calendar sometimes differs from the Gregorian calendar by one month.

In order to coordinate the number of days between the solar calendar year and the lunar calendar year, the lunar calendar was produced. The method is to add 24 solar terms and "19 7 leap year" to the calendar (that is, add 7 leap years to 19 lunar year). There is one more leap month in the leap year of the lunar calendar, so there are 383-385 days in a year, while the average year of the lunar calendar generally has 353-355 days. ) make the average number of days in a year consistent with the number of days in the Tropic of Cancer.

Therefore, this calendar conforms to both the moon and the periodic movement of the earth around the sun. The "leap method" sets 7 leap months every 19, and the year with leap months is 383 days or 384 days, which is called leap year.

Baidu encyclopedia-lunar calendar

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