What is the difference between the summer calendar and the lunar calendar?

The lunar calendar is a calendar in which a year is marked by a complete and short moon cycle. Because the ancient people in China called the moon "lunar", this calendar was called "lunar calendar". People nowadays have long forgotten what the lunar calendar is.

The lunar calendar is very inaccurate in use, which is out of step with the "sidereal year" of the earth, and the average annual error is about 1 1 day.

In order to adjust this error, seven "leap months" are added every 19 years. This is the origin of the saying "seven leaps in nineteen years" and "two leaps in three years". Because in ancient China, the calendar mainly served agricultural production, so the adjusted calendar was called "Lunar Calendar".

The emergence of the lunar calendar, about the Yin and Shang dynasties, who was the inventor, has not been verified. So Li Xia's statement is incorrect.

On the annual "Winter Solstice", the emperor will release the calendar for the next year at the meridian gate, so the people call the lunar calendar "imperial calendar".

Now people always say "the yellow calendar", which is absolutely wrong.

Bottom line: A calendar that marks a day with the rotation of the earth, the revolution of the moon and the rotation of the earth is called the lunar calendar. So the lunar calendar is a kind of "yin and yang calendar".

Due to the large errors in the lunar calendar, it is impossible to accurately guide people's activities. Therefore, after the Revolution of 1911, the Constitution of the Republic of China stipulated that the calendar was changed from 19 12 to Gregorian calendar. Gregorian calendar 65438+ 10 month 1 is called "New Year's Day". Change New Year's Day on the first day of the first lunar month to "Spring Festival". New China continued this calendar.

Because the Gregorian calendar was introduced from the west, it is also called "Western Calendar".

Some people call the solar calendar "new calendar" and the lunar calendar "old calendar" and "old calendar".

Because the Gregorian calendar is based on the revolution of the earth around the sun, it is also called the "solar calendar".

The lunar calendar, except for some traditional festivals in China, is basically useless.