What does the lunar calendar mean? Is it fast or slow?

The specific calculation method of the lunar calendar is: one week of lunar eclipse is a month, which lasts for 29 days 12 hours, 44 minutes and 2.8 seconds, and 12 weeks of lunar eclipse is a year, which lasts for 354 days, 8 hours, 48 minutes and 33.6 seconds.

According to the actual number of days over the years, it is about 10 days less than the return, 2 1 hour, 1 minute, and the tropic year of 2.7 is one year different from the tropic year of 32.6. In this calendar, the calculation of day and night begins at sunset and ends at sunset the next day, which is usually called before the night trip, that is, the night is before and the day is after, forming a day. So the lunar calendar is slower than the solar calendar.

Extended data:

The origin of the lunar calendar:

In the lunar calendar, the moon is full and short for one month, ***29 and a half days. For the convenience of calculation, the big moon is customized for 30 days and the small moon is customized for 29 days. During the period of 65438+mid-February of a year, generally, large and small months are arranged alternately. There are about 365 days in the lunar calendar year, and there is no difference between a normal year and a leap year.

The lunar calendar does not consider the movement of the earth around the sun, so the changes of the four seasons in the lunar calendar have no fixed time and cannot reflect the seasons. This is a great disadvantage. In order to overcome this shortcoming, people later decided on a new calendar, which is the so-called yin-yang desk calendar. The summer calendar (also called lunar calendar or lunar calendar) still in use in China is this kind of lunar calendar.

Just like the lunar calendar, a month is customized according to the time when the moon is full and short, that is, the big month is 30 days and the small month is 29 days. However, by adding leap months, the average number of days in each year is close to the solar calendar, thus adjusting the four seasons. The lunar calendar has a leap month every two or three years.