Which date do you usually say is the lunar calendar or the solar calendar?

The date of a month usually refers to the solar calendar.

At present, the Gregorian calendar, which is commonly used in the world, is a solar calendar, with 365 days in a normal year and 366 days in a leap year, once every four years, once in a hundred years and once again in the 400th year, that is, there are 97 leap years every 400 years.

The lunar calendar determines the moon according to the law of its movement: the orbit of the moon is called the white road, and both the white road and the ecliptic are two great circles on the celestial body, which intersect at five degrees and nine minutes. The moon goes around the earth and appears on the ecliptic twice, which lasts for 7 hours and 43 minutes 1 1.5 seconds on the 27th, and is called "Stellar Moon".

Extended data:

1, the lunar calendar in China is a combination of yin and yang, and the lunar calendar (lunar calendar) is about the 15th day of the first lunar month. heavenly stems and earthly branches is talking about the relationship between the sun and the earth, which is a solar calendar. The twenty-four solar terms and December are the basic contents.

2. The formation of the calendar has a process, starting with the date. As early as the Shang dynasty, the day of dry support appeared. Twelve dates were adopted in the Spring and Autumn Period and the Warring States Period, and the overtime system of twelve dates was adopted in the Western Han Dynasty at the latest. From the end of the Western Han Dynasty to the present, we have been using dry branches to record the years.

3. After the Tang Dynasty, the names of the calendars of the Five Dynasties began to be marked with branches. By the Northern Song Dynasty, the dates of the ten branches and twelve branches matched the chronological time. So far, all the dates have been marked with dry branches, and the dry branch calendar has become more and more complete. Since 2000, the chronology of China's cadres and branches and the chronology of calendar years have cooperated with each other and become a system of their own. In fact, the chronological system of China calendar is a unique solar calendar system in China. Also known as the solar calendar. It takes beginning of spring as the beginning of the year and festivals as the beginning of the month.

References:

Baidu encyclopedia-solar calendar

References:

Baidu encyclopedia-lunar calendar