What is the meaning of the national calendar?

The national calendar refers to the summer calendar traditionally used in China.

The national calendar refers to the summer calendar traditionally used in China. In astronomy, people think that the summer calendar is actually a kind of yin-yang calendar. The Gregorian calendar, also known as the Gregorian calendar, means that when people can calculate the time when the earth orbits the sun once, it is a year, that is, the Gregorian calendar and the Gregorian calendar. Later, it was reformed to form the Gregory calendar.

The origin of the summer calendar

Li Xiali is a calendar made by Xia Dynasty, and Li Xiali is one of the calendars of ancient Han nationality. It is also called the six ancient calendars together with Huangdi Calendar, Zhuan Xu Calendar, Yin Calendar, Zhou Calendar and Lv Calendar.

According to legend, the calendar was founded in the Xia Dynasty, and the original calendar rules have been lost. Now we can only learn something from some ancient books: the month from winter solstice is used as the sub-month to start the calendar year, and the calendar year starts from the month in silver moon, that is, Andrew (later called Xia Zheng), which is roughly an integer of 366 days a year. The time difference is adjusted by subtraction and positive leap.

China's traditional calendar, now known as Li Xia, was called Li Xia after the adoption of the western calendar in the revolution of 19 1 1. Some people think that China's traditional calendar is in summer, so it is called Li Xia.