On the birth lunar calendar and solar calendar

The lunar calendar uses the period of the moon to determine the month. The moon never grows up slowly, becomes a full moon, that is, a round moon, then becomes smaller and finally disappears. It's called a month at this time. So it is also called a calendar. The ancient moon in China was also called the lunar calendar, so the monthly calendar was called the lunar calendar. The moon revolves around the earth for about twenty-nine and a half days. So a month in the lunar calendar is 29 or 30 days. A year is called 12 months, and a year is 354 or 355 days. However, it takes about 365 and a quarter days for the earth to go around the sun. One year after the lunar calendar, the earth has not returned to the starting point of the orbit, about ten days short. In this way, one month is missing in three years, and 18 is missing for half a year. That is to say, after 18, the first day of the first month will be in summer instead of winter. What should I do? Astronomers in ancient China figured out how to add one month every three years. The usual year is twelve months, and a year with one month is called leap year, which is thirteen months. Although this can ensure that the first day of the first month is winter, the position of the earth on the orbit of revolution on the first day of the first month of the lunar calendar is not fixed, so the position of the earth on the orbit of revolution on other days is not fixed, about ten days apart every three years. This is why according to the solar calendar, the Spring Festival is sometimes in January and sometimes in February.

There is also a name in the lunar calendar. But farmers can't farm according to the lunar calendar, because the days in the old calendar are not fixed. If the date of farming is mistaken for several tens of days, the harvest will be greatly affected. In order to solve this problem, ancient astronomers in China came up with a good way to divide the earth's orbit into 24 parts. That is, China's 24 solar terms. Farmers use these 24 solar terms to farm, not the lunar calendar.

The solar calendar, also known as the solar calendar, uses the period of the earth's revolution around the sun to make a year have 365 days, and then divides it into 12 months. Similar to the lunar calendar, the position of the days in the solar calendar on the orbit of revolution is also changing, with a difference of one day every four years, which is added to February. In this way, the swing of the solar calendar day is very small, only one or two days. For people, this day or two is nothing and can be completely ignored. So the solar calendar doesn't need solar terms.

1, 1992 June 1 1 is the solar calendar.

2.1May 1992 1 1 day is the lunar calendar.

I hope it helps you.