Is there a difference between the year and the year in the calendar?

There are still differences between years in calendars, especially in China's ancient calendars.

The appellation of "Nian" appeared later, while the appellation of "Nian" appeared earlier.

Years old, is the relic of the traditional chronological method. The so-called "Tai Sui" is an imaginary star whose trajectory is opposite to that of the "old star". It runs on the ecliptic and walks past a house every year.

However, because this is only similar to walking through a palace in a year, it is found that the time of the zodiac and the revolution of the earth is not equal, so the "Tai Sui Chronology Method" is gradually eliminated.

Nian is the name of a spring and autumn cycle used in the calendar of agricultural culture promotion. The Winter Solstice was the beginning of a year in the pre-Qin period. Emperor Wu of the Han Dynasty changed the calendar and took beginning of spring as the beginning of the year. Combined with the lunar month.