Is the lunar calendar a solar calendar or a lunar calendar?

The lunar calendar is not a lunar calendar or a solar calendar, but a combination of yin and yang.

Lunar calendar is the current traditional calendar in China, which belongs to the combined calendar of yin and yang, that is, the combined calendar of lunar calendar and solar calendar. According to the change cycle of the moon phase, each moon phase changes to one month, the solar reference year is one year, and 24 solar terms are added, and leap months are set to adapt the average calendar year to the tropic year. The combination of the lunar calendar and the solar calendar in the lunar calendar forms a method of combining yin and yang, which was called the summer calendar in ancient times because of the adoption of Xia Zheng.

Calendar is based on the natural law of astronomical changes, to measure a long time interval, judge climate change, and predict the coming season. According to calendar year, calendar year and calendar month, it is divided into ephemeris, solar calendar, lunar calendar and yin-yang calendar.

Rule calculation

The calculation of solar terms and the time of the first lunar month shall be based on East longitude 120 degrees and China Standard Time. The zodiac is the coordinate value used to determine the position of celestial bodies on the earth in the ecliptic coordinate system, which is divided into 360 degrees. In this system, the earth is divided into two hemispheres by the ecliptic plane. When the sun runs to the longitude of 0 degrees, it is the vernal equinox; When it moves to 90 degrees longitude, it is the summer solstice; When it moves to 180 degrees, it is the autumnal equinox; When it moves to 270 degrees, it is the winter solstice.

The uneven motion of the sun on the ecliptic is not considered in the calculation of the average air. The first anniversary time is divided into 24 solar terms in 24 equal parts, and the average number of days between the two solar terms is 15.22 days. In the calculation of steady air, the uneven motion of the sun on the ecliptic is considered. The spring is divided into 0 degrees, and every time the sun runs on the ecliptic, 15 degrees is a solar term, and the time of each solar term is uneven.